Skocz do pozycji: 1.

Tytuł:

New luminescence ages reveal Early to Middle Weichselian deposits in central Latvia

Autorzy:

Lamsters, K.
Kalińska-Nartiša, E.
Zelčs, V.
Alexanderson, H.

Powiązania:

https://bibliotekanauki.pl/articles/2060383.pdf

Data publikacji:

2017

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

optically stimulated luminescence (OSL) dating
subglacial bedforms
Early Weichselian
Middle Weichselian
central Latvia

Opis:

New optically stimulated luminescence (OSL) ages show that sandy deposits overlain by Late Weichselian subglacial till in central Latvia are of Early to Middle Weichselian age. The finer chronological resolution of unconsolidated sediment deposition in the Central Latvian Lowland (CLL) remains relatively unstudied, and here we provide a first characterisation of the deposits with respect to their age. Three OSL ages ranging between 84 ± 9 ka and 112 ± 11 ka suggest that the deposits studied in the CLL are of Early Weichselian age (MIS 5). We found no Middle Weichselian deposits in the CLL, and assume that any such younger sediments might have been eroded during the advance of the Zemgale Lobe in the Late Weichselian. One site, in the ice-marginal zone adjacent to the interlobate area, has nevertheless deposits dated to 44 ± 10 ka corresponding to the Middle Weichselian (MIS 3). Our results are compatible with existing ESR ages on three sets of Portlandia arctica shells from the central part of the lowland; the shells had been incorporated into glacial deposits during later glacial advances. Finally, our findings largely support ice-free conditions during the Early and Middle Weichselian in the middle and southern part of central Latvia.

Źródło:

Geological Quarterly; 2017, 61, 2; 480--490
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:

Palaeoglaciology of the Weichselian Odra ice lobe, NE Germany and NW Poland

Autorzy:

Hermanowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/295026.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

subglacial drainage
subglacial landforms
Odra lobe
Weichselian glaciation
ice movement dynamics

Opis:

Southern part of the Scandinavian Ice Sheet terminated in large lobes projecting tens of kilometres beyond the main ice sheet margin. One of the main ice lobe was the Odra lobe localized in NE Germany and NW Poland. In this study concise description of current morphology of the Odra lobe area is given with special reference to subglacial hydraulic conditions during the ice sheet advance. Subglacial conditions were simulated by using time-dependant three-dimensional numerical model, and obtained results were compared to geological observations. The results show entire groundwater system alternation that affected the ice/bed coupling and influenced formation of specific subglacial landforms. Coupling the simulation results with empirical estimates of basal melting rate suggests that only a small fraction of basal meltwater could have drained to the ice forefield as groundwater. Adverse slope of the low-permeable ice bed hampered water drainage, and led to water accumulation at the ice/bed interface that in turn facilitated basal sliding and bed deformation.

Źródło:

Landform Analysis; 2010, 14; 12-24
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Vegetation and climate changes at the eemian/weichselian transition : new palynological data from central Russian plain

Autorzy:

Borisova, O. K.

Powiązania:

https://bibliotekanauki.pl/articles/1186124.pdf

Data publikacji:

2005

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

palynology
Eemian/Weichselian transition
Central Russian Plain

Opis:

Palynological analysis of core Butovka obtained from the Protva River basin 80 km south-west of Moscow (55 stopni10'N, 36 stopni 25'E) provides a record of vegetation and climate change in the central Russian Plain spanning the Last Interglacial and the beginning of the following glacial epoch. Pollen profiles of the Mikulino (Eemian) Interglaciation in the Central Russian Plain show a distinctive pattern of the vegetation changes, reflecting an increase in temperatures towards the optimum phase of the interglaciation followed by a gradual cooling. Rapid climatic deterioration, manifesting an onset of the Valdai (Weichselian) Glaciation, took place after a slower cooling accompanied by increasing humidity of climate during the post-optimum part of the Mikulino Interglaciation. The interglacial/glacial transition had a complex structure, being marked by a sequence of secondary climatic oscillations of varying magnitude. A decreasing role of mesophilic plants and an increase in abundance and diversity of the xerophytes and plants growing at present in the regions with highly continental climate in the Butovka pollen record suggests that during the Early Valdai the climate grew both more continental and arid. With this tendency at the background, two intervals of climatic amelioration can be distinguished. Both of them are marked by the development of the open forest communities similar to the contemporary northern taiga of West Siberia. The latter of the two warm intervals had a larger magnitude of temperature changes than the first one, as indicated by a greater landscape role of dark-coniferous trees (Picea + Abies + Pinus sibirica). Based on its stratigraphic position and inferred features of climate and vegetation, the latter of the two warm intervals identified in the Butovka pollen profile can be correlated with the Upper Volga Interstade in the Russian Plain, or the Brőrup Interstade in West Europe. We can also tentatively correlate it with warm DO event 23 as reflected in the oxygen isotope record from the Northern Greenland deep ice-core (North GRIP Members, 2004). A slighter and shorter warming within the first cold stage of the Early Valdai probably had an interphasial rank and corresponded to a shorter DO event 24 in the NorthGRIP oxygen-isotope curve.

Źródło:

Polish Geological Institute Special Papers; 2005, 16; 9--17
1507-9791

Pojawia się w:

Polish Geological Institute Special Papers

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:

Lithology and palaeomagnetic record of Late Weichselian varved clays from NW Russia

Autorzy:

Bakhmutov, V.
Kolka, V.
Yevzerov, V.

Powiązania:

https://bibliotekanauki.pl/articles/2059241.pdf

Data publikacji:

2006

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Kola Peninsula
Late Weichselian
varved clays
magnetic parameters
palaeomagnetism

Opis:

A lithological and palaeomagnetic analysis of Late Weichselian glaciolacustrine deposits from two ancient periglacial lakes was carried out in the valley of the Shuja (S Karelia) and Ust-Pjalka (S-E Kola Peninsula) rivers, NW Russia. The rhythmic structure of the varved clays is interpreted as turbiditic with systematic differences between the proximal and distal areas of accumulation. In the proximal area the textural and structural properties of the deposits towards both distal and (partly) lateral directions are described. It is shown that the proximal varve successions are incomplete while distally they are continuous. The accumulation of one varve (DE rhythm, second order cycle) during one year is consistent with palaeomagnetic data. Significant differences in magnetic parameters and in the palaeomagnetic "records" of declination-inclination between proximal and distal varves are established. Analysis of palaeomagnetic properties was combined with lithological analysis in all sections. Locally, the varved clays in the proximal area could be used for palaeomagnetic research. Taking into account the erosion of underlying deposits by turbidity currents and inclination shallowing, these sediments could not precisely record palaeosecular variation (PSV). The distal varved clays (represented by the DE rhythms) are clearly most useful both for varve-clay chronology and PSV recovery. The palaeomagnetic declination and inclination records are correlated with chrono- and magnetostratigraphy scheme of NW Russia. This paper also examines lithology-dependent "inclination error" and anisotropy of magnetic susceptibility in glaciolacustrine sediments.

Źródło:

Geological Quarterly; 2006, 50, 3; 353-368
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:

The development of periglacial sedimentation in the Wolica Valley (SE Poland) during the Weichselian Upper Pleniglacial

Autorzy:

Superson, J.
Zagórski, P.

Powiązania:

https://bibliotekanauki.pl/articles/294434.pdf

Data publikacji:

2003

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

periglacial sedimentation
Lublin Upland
terrace deposits
Weichselian Upper Pleniglacial

Opis:

The development of the Weichselian Upper Pleniglacial periglacial sedimentation in the Wolica Valley was evaluated by means of geomorphological, geological and sedimentological investigation. Sediments of the medium (II) raised terrace, the surface area of which is a dominant element of the valley, were examined. The terrace has a complex structure comprising deposits of different age, lithology and origin. The basal part of the terrace is formed from terrace remnants from the Middle Pleniglacial and the phase before maximum cold of the Upper Pleniglacial. The base consists of sandy channel deposits and silty-sandy floodplain deposits. The upper part of the terrace is a thick series of deposits from the phase after maximum cold. It is built from slope, floodplain and channel deposits, as well as alluvial fans. The complexity of the structure results from the specific character of periglacial processes and their rhythmical course, as well as from the influence of local conditions. The deposits of the basal part of the terrace were shaped in a subpolar climate with maritime features, whereas the sediments of its upper part formed in continental subpolar climate. Local factors, such as: lithology of rocks in the river drainage basin, a dense network of valleys in the basin and alluvial fans, determined the suspension type of transport, the shape of the river channel and retention of a large amount of sediment in the Wolica drainage basin and on its valley-floor.

Źródło:

Landform Analysis; 2003, 4; 17-37
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Evolution of the Toruń Basin in the Late Weichselian

Autorzy:

Weckwerth, P.

Powiązania:

https://bibliotekanauki.pl/articles/295066.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Opis:

The Toruń Basin is the eastern fragment of the Noteć-Warta ice-marginal streamway. Genesis of the Toruń Basin firstly demonstrates processes of erosion and accumulation of meltwaters and the Vistula waters which occur on the background of changes in the height of erosion base and tectonic movements. In the formation of the Toruń Basin one cannot exclude its older, glacial and interglacial assumptions either, as through its location the form is related to the course of the fossil valleys. The article presents functional stages and reorganizational mechanisms of water discharge directions in the Toruń Basin, stimulated by the tectonic activity of the older bed. In the Toruń Basin the following terrace sets can be distinguished: a) the outwash levels formed not so far away from the ice-sheet front, i.e. during the Wąbrzeźno Subphase, b) the distal sections of the outwash (XI, X), c) the Vistula ice-marginal streamway terraces (the transitional terrace and IX), d) the Vistula ice-marginal streamway terraces (VIII-VI) from the period of this river bifurcation at Fordon, and e) lower terraces of the Vistula valley. In the upper part of the Late Weichselian waters formed a system of sandbed braided rivers with changeable flow regime, which initially had higher energy, then reduced energy and high again. This resulted from the ice-sheet front retreat, intensity of its ablation and the inflow of the Vistula waters from the south.

Źródło:

Landform Analysis; 2010, 14; 57-84
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Rate of loess accumulation in Europe in the Late Weichselian (Late Vistulian)

Autorzy:

Fedorowicz, S.
Łanczont, M.

Powiązania:

https://bibliotekanauki.pl/articles/2059500.pdf

Data publikacji:

2007

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

European loess
Upper Weichselian
mass accumulation rates (MAR)
TL age
optically stimulated luminescence (OSL)

Opis:

The European loess profiles provides evidence of changes in climate in the last glacial cycle. The final stage of loess accumulation took place in the youngest part of the last glacial (28 to 12 ka BP). Loess accumulated in two periods: from 28 to 18 ka BP and from 18 to 13 ka BP. These two stages were separated by a short phase of weaker aeolian activity and weak pedogenesis (initial tundra gleyed soils). The loess sedimentation rate can be defined as a mass accumulation rate (MAR ex pressed in g/m2/year). This value was calculated by Frechen et al. (2003) for several dozen loess sites across western and central Europe. In this paper we calculate the MAR for several loess sites in Poland and Ukraine. The MAR distribution across Poland and Ukraine is uneven in these two intervals. The MAR values oscillate between 100 to several thou sand g/m2/year. They markedly in crease eastwards, which may be explained by the latitudinal gradient of periglacial climate in the LateWeichselian (= Late Vistulian). The MAR distribution along a N-S trend confirms its large range in western and central Europe. However, the most easterly profiles (Polish and Ukrainian ones) show less variable thick nesses as the MAR was stable at a relatively low level from several hundred to more than a thou sand g/m2/year. This stability of the MAR characterized both loess-forming intervals in this part of Europe.

Źródło:

Geological Quarterly; 2007, 51, 2; 193-202
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Malacological characteristic of the Weichselian Upper Pleniglacial (MIS-2) loess profile in Tłumaczów (SW Poland)

Autorzy:

Alexandrowicz, W. P.
Ciszek, D.
Gołas-Siarzewska, M.

Powiązania:

https://bibliotekanauki.pl/articles/2060552.pdf

Data publikacji:

2013

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

loess
malacofauna
Weichselian Upper Pleniglacial
Sudetes
southern Poland

Opis:

The profile of silty sediments in Tłumaczów was the subject of detailed lithological and malacological analyses. Abundant malacofauna represented by typical loess species were found in the sediments. The variability of the species composition and ecological structure of faunal assemblages provided the basis for the reconstruction of the sedimentary environment and characteristics of the climatic conditions that prevailed during the deposition of the sediments. The results of analyses indicate that the described sediments belong to the youngest loess series related to the Weichselian Upper Pleniglacial (MIS-2). The sequence of molluscan assemblages shows considerable similarities to the described faunas found in numerous loess profiles in southern Poland. It differs substantially from the malacological sequences recognized in loess profiles in Western and Southern Europe. This proves the significant and climate-determined diversification of malacocoenoses during the Weichselian Upper Pleniglacial (MIS-2) in Europe.

Źródło:

Geological Quarterly; 2013, 57, 3; 433--442
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Eemian–Weichselian Pleniglacial fluvial deposits in S Poland (an example of the Vistula River valley in Kraków)

Autorzy:

Sokołowski, T.
Wacnik, A.
Woronko, B.
Madeja, J.

Powiązania:

https://bibliotekanauki.pl/articles/2059974.pdf

Data publikacji:

2014

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Eemian-Weichselian
river deposits
climate change
environmental change

Opis:

A fragment of the middle terrace in the VistulaRivervalley, nearby the railway station in Kraków, is formed by fluvial channel and overbank deposits of the PrądnikRiver, which bear a record of various environments affected by changing climatic conditions. The sedimentary succession includes two complexes that differ in lithofacies. The older complex comprises fining-upward deposits (channel sand and gravelly sand with medium- and large-scale trough cross-stratification) and, less frequently, sand with planar cross-stratification overlain by silt with intercalations of biogenic deposits of abandoned channels. Vegetation accompanying the deposition of biogenic layers was typical of boreal coniferous forests, dominated by Pinus sylvestris with a small admixture of Larix, Pinus cembra, Picea, Betula, and Populus. Periodically, the landscape passed into open areas overgrown by woody tundra. The complex developed as a result of activity of a meandering river under conditions of a moderately cool climate. The younger complex includes the sand lithofacies with horizontal stratification and low-angle cross-stratification, overlain by alternating sands and silts. The topmost part is represented by sands with large- and medium scale planar cross stratification. Lack of biogenic deposits and considerable amount of frosted quartz grains in alluvial sediments indicate aeolian processes of greater intensity, periglacial conditions and evolution towards a braided or transitional river. Pollen successions, absolute dating and studies of structural and textural features of the sediment suggest that the time of its deposition may be estimated at a range between the close of the Eemian Interglacial and the Weichselian Middle Pleniglacial (OIS 5e–OIS 3).

Źródło:

Geological Quarterly; 2014, 58, 1; 71--84
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:

Dumpstones as records of overturning ice rafts in a Weichselian proglacial lake (Rügen Island, NE Germany)

Autorzy:

Pisarska-Jamroży, M.
Van-Loon, A. J. T.
Bronikowska, M.

Powiązania:

https://bibliotekanauki.pl/articles/2060089.pdf

Data publikacji:

2018

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

dumpstones
dropstones
ice-rafted debris
Weichselian
glaciolacustrine sediments

Opis:

Dumpstones and dropstones up to 0.8 m in size occur in a silty/sandy Weichselian glaciolacustrine succession near Dwasieden on Rügen Island in the SW Baltic Sea (NE Germany). The deposits are exceptional because two levels of dumpstones and dropstones are present, suggesting two dumping phases interrupting characteristic fine-grained glaciolacustrine sedimentation. Plastic downwarping of sediments below the dumpstones and dropstones result in soft-sediment deformation structures. The distribution and orientation of the long axes of the clasts are useful tools for the reconstruction of the state of the lake bottom, as well as for the water depth. The horizontal position of the gravels and boulders (parallel to the bedding) suggests deposition in relatively shallow-water. The dumping events are linked to iceberg rafting in a glacial lake during the Weichselian Glaciation (MIS 2).

Źródło:

Geological Quarterly; 2018, 62, 4; 917-924
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Simulation of the shorelines of glacial Lake Peipsi in Eastern Estonia during the Late Weichselian

Autorzy:

Rosentau, A.
Hang, T.
Miidel, A.

Powiązania:

https://bibliotekanauki.pl/articles/2058810.pdf

Data publikacji:

2004

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Late Weichselian
glacial Lake Peipsi
proglacial environment
GIS
water level changes
glacial rebound

Opis:

Digital reconstruction of the evolution of glacial Lake Peipsi, Eastern Estonia, was based on a geographic information system (GIS) method that removed isostatically deformed palaeowater planes fromthe current digital terrain model. A reconstruction of the proglacial water levels was performed with respect to geomorphological correlation of river terraces, raised shorelines and eroded surfaces of various aqueoglacial landforms. The configuration of shorelines, main outlets and water depths of glacial Lake Peipsi, corresponding to the Otepää, Piirissaar, Kaiu and Pandivere–Neva stades during the deglaciation of the Lake Peipsi depression, was simulated. The two approaches used, reflecting the geomorphological correlation of Raukas and Rähni (1969) and Hang (2001), are discussed.

Źródło:

Geological Quarterly; 2004, 48, 4; 299--307
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Streamlined topographical features in and around the Gulf of Riga as evidence of Late Weichselian glacial dynamics

Autorzy:

Tsyrulnikov, A.
Tuuling, I.
Hang, T.

Powiązania:

https://bibliotekanauki.pl/articles/2060206.pdf

Data publikacji:

2008

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Gulf of Riga
Baltic Sea
Late Weichselian glaciation
Riga ice stream
glacial topography
bottom relief

Opis:

Based on various cartographic sources, a digital terrain model and acoustic profiling data, linear relief features of glacial origin have been distin guished and analysed in the Gulf of Riga and adjacent mainland areas in order to reconstruct the dynamics and pathways of former ice streams. North-east–south-west oriented features in the till topography prevail in the central part of the gulf and along the southern coast of the island of Saaremaa, which corroborate the previously known south/south-east di rection of the main Riga ice stream. North-east to south-west directed features dominate in the Pärnu Bay and around the Irbe Strait. Similar deviations from the Riga ice stream are most likely due to ice divide zones, namely the Sakala Upland in Southern Estonia and Kurzeme in north western Latvia, which locally changed the course of the main ice flow. The influence of the Kurzeme ice divide is traceable at the bottom of the gulf up to the southern coast of Saaremaa. There is no evidence of an ice-marginal zone cross ing the central part of the Gulf of Riga as was supposed earlier. The Pandivere-Neva and Palivere ice-marginal zones, which merge on the Sorve Peninsula, probably continue offshore into the Irbe Strait. As the age of the glacier relieffeatures is poorly contained, the chronologi reconstruction of the ice dynamics is tentative.

Źródło:

Geological Quarterly; 2008, 52, 1; 81-81
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Radiocarbon ages of bones from Vistulian (Weichselian) cave deposits in Poland and their stratigraphy

Autorzy:

Lorenc, M.

Powiązania:

https://bibliotekanauki.pl/articles/139041.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Radiocarbon (C-14) dating of bones
Vistulian (Weichselian)
chronostratigraphy
cave deposits/sediments
redeposition
węgiel aktywny
datowanie kości
vistulian
chronostratygrafia
osady jaskiniowe
redepozycja

Opis:

Twenty-six bone samples from cave sediments mainly of Vistulian (Weichselian) age were radiocarbon (AMS) dated. The material comes from seven localities in the Krakow-Czestochowa Upland and in Podhale (southern Poland). These are: the Komarowa Cave, the Deszczowa Cave, the Upper Rock Shelter of the Deszczowa Cave, the cave in Dziadowa Skala, the Saspowska Zachodnia Cave, the Mamutowa Cave and the Oblazowa Cave. The obtained radiocarbon ages of most of the samples differs from their stratigraphy as formerly proposed. The reasons for this discrepancy are discussed. Also examined were the radiocarbon ages of bones from other caves in the study area. Most of the dated bones are shown to have come from relatively short time periods. The existing data on radiocarbon age of bones from Vistulian cave deposits of the Krakow-Czestochowa Upland and Podhale are summarized.

Źródło:

Acta Geologica Polonica; 2013, 63, 3; 399-424
0001-5709

Pojawia się w:

Acta Geologica Polonica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:

Heavy minerals as a tool to reconstruct river activity during the Weichselian glaciation (Toruń Basin, Poland)

Autorzy:

Weckwerth, Piotr
Chabowski, Marek

Powiązania:

https://bibliotekanauki.pl/articles/94678.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

heavy minerals
ice-marginal valley
river-discharge regime
channel-pattern transformation
Toruń Basin
Weichselian
ciężkie minerały
pradolina
dorzecze Torunia
zlodowacenie północnopolskie

Opis:

The heavy-mineral composition of the Weichselian fluvial successions deposited by an ephemeral meandering river and by a sand-bed braided river in the Toruń Basin (central Poland) was analysed. On the basis of a lithofacies analysis, in combination with the composition of the heavy-mineral assemblages, the fluvial processes and river-channel morphology were reconstructed. This allows determining the provenance of the fluvial deposits and the rivers’ discharge regimes. A model is proposed which can explain the changes in the amount of individual minerals in the fluvial sediments of different ages under the conditions of the oscillating Scandinavian ice sheet. The model assumes that, during the ice-sheet advances, the proglacial streams supplied large amounts of heavy minerals that were less resistant to mechanical abrasion. During the main phase of the ice-sheet retreat, the distance between the ice sheet and the Toruń Basin increased, and the amount of non-resistant minerals diminished as a result of sediment reworking in proglacial rivers. Due to the unique location of the Toruń Basin at the front of the Scandinavian ice sheet during the Weichselian glaciation, the heavy-mineral assemblages in the fluvial deposits form a valuable tool for the recognition of the ice-sheet extent.

Źródło:

Geologos; 2013, 19, No. 1-2; 25-46
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Morfologia osadów podłoża zlodowacenia Wisły na obszarze polskiej części lobu Odry
Morphology of the Vistulian (Weichselian) glaciation substratum in the area of Polish part of the Odra lobe

Autorzy:

Hermanowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/2066059.pdf

Data publikacji:

2007

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

gliny
zlodowacenia Wisły
lob Odry
piętro Pomorskie
drenaż subglacjalny
till
Vistulian (Weichselian) glaciation

Źródło:

Przegląd Geologiczny; 2007, 55, 2; 133-133
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Drenaż subglacjalny i jego wpływ na dynamikę lobu Odry zlodowacenia wisły
Subglacial drainage and its influence on the dynamics of the Weichselian Odra lobe

Autorzy:

Hermanowski, P.
Piotrowski, J. A.

Powiązania:

https://bibliotekanauki.pl/articles/2074717.pdf

Data publikacji:

2009

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

drenaż subglacjalny
lob Odry
dynamika ruchu lodowca
zlodowacenia Wisły
subglacial drainage
Odra lobe
groundwater
ice movement dynamics
Weichselian glaciation

Opis:

In this paper we have analyzed the influence of the Weichselian ice sheet advance on the groundwater system in the Odra lobe area using hydrogeological numerical modelling performed with the finite difference method. The results indicate entire re-organization of the groundwater system in relation to non-glacial times mainly affecting the flow directions, velocities and fluxes. The re-organization of groundwater flow was caused by the pressure gradient imposed by the sloping ice sheet surface especially obvious under the ice margin and some distance in front of it. Simulated groundwater flow velocities are significantly higher than the present velocities in that area while the major groundwater flow direction is to the south, i.e. opposite to the present direction. Coupling the simulation results with assumed basal melting rate suggests that only a small fraction of basal meltwater [~24%) could have drained through the bed. The surplus water likely accumulated at the ice/bed interface facilitating faster ice flow of the Odra lobe due to enhanced basal sliding and bed deformation.

Źródło:

Przegląd Geologiczny; 2009, 57, 6; 504-512
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Mollusc faunas of lake deposits in Gorzów Wielkopolski (NW Poland) as an indicator of environmental changes during Eemian and Early Weichselian

Autorzy:

Alexandrowicz, Witold Paweł
Skoczylas, Sylwia
Sobczyk, Artur
Stefaniak, Krzysztof
Kotowski, Adam
Przybylski, Bogusław
Ciszek, Dariusz
Badura, Janusz
Urbański, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/2060111.pdf

Data publikacji:

2021

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

palaeolake
malacofauna
environmental changes
Eemian interglacial
Early Weichselian
NW Poland

Opis:

During the construction of the S-3 road near Gorzów Wielkopolski, a sedimentary succession of the Eemian Interglacial and the older part of the Weichselian Glaciation were exposed. The succession, ~22 m thick, consists of lacustrine and fluvioglacial deposits. Lake sediments, mainly calcareous gyttja with peat intercalations, represent the infills of two palaeolakes. The almost complete skeleton of a forest rhinoceros, Stephanorhinus kirchbergensis, and a bone of the fallow deer Dama dama were found in the older lake deposits. Mollusc shells were numerous in both lake sequences, analysis of which revealed two types of assemblage, representing the coastal, littoral zone of a shallow lake with a muddy bottom. The sequence of mollusc communities observed in vertical succession allowed reconstruction of environmental changes during deposition. Several hydrological changes have been recognized within the palaeolake, especially water level fluctuations probably due to climate change.

Źródło:

Geological Quarterly; 2021, 65, 3; 65: 36
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

The Young Baltic advance in the western Baltic depression

Autorzy:

Stephan, H. J.

Powiązania:

https://bibliotekanauki.pl/articles/2059318.pdf

Data publikacji:

2001

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Palaeo-ice stream
Baltic Depression
Weichselian
till facies
ice flow

Opis:

The last Weichselian glacial advance into the western Baltic depression, the so-called "Young Baltic" glacier advance is described. In the southern Baltic depression, ice masses flowed westwards and fanned out in the western Baltic region where they terminated along the end moraines of the East Jutland advance (Denmark), Sehberg advance (Schleswig-Holstein) and Mecklenburg advance (Mecklenburg-Vorpommern). The westward ice advance is likely due to the rapid melting of Norwegian and Swedish ice masses which had previously blocked the more easterly ice masses from draining to the west and north-west. The deposition of a purely eastern-sourced debris facies by a Baltic ice stream in the far west might be the result of ice/bed separation during flow.

Źródło:

Geological Quarterly; 2001, 45, 4; 359-364
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

New approach to garnet redistribution during aeolian transport

Autorzy:

Lisá, L.
Buriánek, D.
Uher, P.

Powiązania:

https://bibliotekanauki.pl/articles/2059212.pdf

Data publikacji:

2009

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Weichselian
Pleistocene
Czech Republic
aeolian sediments
garnet composition
provenance

Opis:

Garnet composition within Late Pleistocene (Weichselian) loess and loess-like deposits was studied in 13 samples of sediment heavy mineral fractions from Moravia and Silesia (Czech Republic). Four areas differing in garnet chemistry were identified, and some regional trends in garnet composition changes were documented. The data obtained support the generally accepted conclu ion of prevailing westerly winds during Weichselian loess deposition. Metamorphic rocks of the Bohemian Massif together with contributions fromig neous (mainly granitic) and sedimentary rocks were indicated as a source for the Weichselian loess and loess-like deposits studied. Local differences in garnet composition depend on the basement source rocks, on prevailing wind direction, on regional geomorphology and on transport distance.

Źródło:

Geological Quarterly; 2009, 53, 3; 333-340
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Transformacja form korytowych na przykładzie aluwiów piaskodennych rzek roztokowych środkowego vistulianu w Kotlinie Toruńskiej
Transformation river channel macroforms : a case study of Weichselian sand-bed braided river sediments in the Toruń Basin

Autorzy:

Weckwerth, P.

Powiązania:

https://bibliotekanauki.pl/articles/294422.pdf

Data publikacji:

2013

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

piaskodenna rzeka roztokowa
odsypy proste i złożone
pradolina
zlodowacenie Wisły
sand-bed braided river
unit and compound bars
Weichselian glaciation

Opis:

Wyniki badań sedymentologicznych prowadzonych w północnej części Kotliny Toruńskiej pozwoliły na rozpoznanie zmian architektury środowiska sedymentacji korytowej piaskodennych rzek roztokowych. Rzeki te funkcjonowały w czasie środkowego vistulianu, a ich osady należą do górnego ogniwa formacji z Zielonczyna. Ewolucja sedymentacji fluwialnej następowała w dwóch fazach, którym odpowiadają odmienne formy korytowe. W pierwszej fazie dno koryta roztokowego zdominowane było przez pojedyncze odsypy poprzeczne, zaś w drugiej doszło do rozwoju złożonych odsypów śródkorytowych w wyniku łączenia się odsypów pojedynczych. Główną przyczyną transformacji morfologii koryta rzeki była zmiana reżimu rzek z niwalnego na proglacjalny w czasie awansu czoła lądolodu w stadiale głównym zlodowacenia wisły oraz rozwój systemu pradolinnego. Transformacja morfologii koryt skutkowała także wzrostem tempa agradacji ich osadów.
The results of sedimentological research documented changes of architectural elements of fluvial sedimentary environment of sand-bed braided rivers in the Toruń Basin. These rivers existed at the middle Weichselian and their deposits belong to the upper member of Zielonczyn Formation. The evolution of fluvial sedimentation took place in the two phases, which correspond to different channel macroforms. The braided river bed was dominated by a unit bars during the first phase, while in the second phase were evolved compound mid-channel bars as a result of the amalgamation of unit bars. The main causes of the transformation of river channel morphology in the area of the Toruń Basin during the Weichselian glaciation included changes in river regime from nival to proglacial and development of ice-marginal valley. Transformation of channel morphology resulted in an increase in the aggradation rate.

Źródło:

Landform Analysis; 2013, 25; 169-177
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Marine terraces in Kaffioyra and Hermansenoya (Oscar II Land, NW Spitsbergen)

Autorzy:

Jaworski, T.

Powiązania:

https://bibliotekanauki.pl/articles/295024.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

marine terraces
raised beaches
Late Weichselian marine limi
Svalbard
Kaffioyra
Hermansenoya

Opis:

The main relief elements which document the sea level changes on the Kaffioyra Plain and the Isle of Hermansenoya, including the sea transgressions, are both abrasive (marine terraces) and accumulative (raised beaches). Such landforms have been relatively well preserved in the area of Kaffioyra. However, the issues relating to the number of such forms and their age remain questionable. They refer to the number of glacial episodes, the extension of the glaciers during these periods as well as the limit of the sea transgressions during and after the deglaciation of the NW Spitsbergen during the Weichselian and Holocene periods. The first detailed geomorphological research which was conducted in Kaffioyra and its vicinity and included geomorphological mapping, was carried out by Niewiarowski and Sinkiewicz during the Toruń Polar Expeditions to Spitsbergen in 1978 and 1985 (Niewiarowski et al. 1993). The authors listed the exact number and extension of the old marine terraces as well as the Late Weichselian marine limit. According to these studies, the Kaffioyra's marine terraces are of two generations. The Isle of Hermansenoya, located four km off the Kaffioyra's shores, has one generation of former marine terraces. The maximum Late Weichselian marine limit in Kaffioyra reached 46–48 m a.s.l., while in Hermansenoya it reached about 33 m a.s.l. On both the Kaffioyra Plain and the Isle of Hermansenoya there is evidence of the Holocene sea level changes.

Źródło:

Landform Analysis; 2010, 14; 25-33
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Conditions of sedimentation in the Weichselian glaciomarginal zone of northeast ern Germany

Autorzy:

Górska-Zabielska, M.

Powiązania:

https://bibliotekanauki.pl/articles/2060222.pdf

Data publikacji:

2008

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

northeastern Germany
Pomeranian phase
lithofacial analysis
environmental architecture components

Opis:

The conditions of glacigenic sedimentation during the Pomeranian Phase of the Weichselian Glaciation in northeastern Germany are reconstructed on the ba sis of the typical lithofacies successions and the depositional architecture of the distal and proximal parts of a sandur, as well as of those in the hinterland area of the glaciomarginal zone. The proximal parts of the sandur are characterized by the occurrence of boulders, pebbles and gravels, and horizontally stratified sands cut by large channel troughs in the upper parts. The occurrence of the channel structures indicates frequent torrential ablation floods. Horizontally and cross-stratified rhythms of sandy and gravelly lithofacies, indicating pulsatory ablation flows, are also frequent. The distal part of the sandur is dominated by horizontally stratified sands and sands with low- angle tabular cross-stratification. In the hinter land of the Pomeranian Glaciation, a thick layer of till is present, which locally is glaciotectonically deformed. Moraines left during glacial retreat, with gravity-redeposited till, are also present.

Źródło:

Geological Quarterly; 2008, 52, 2; 157-157
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Wielkopolska epoka lodowa : osady i formy glacjalne w wybranych stanowiskach Wielkopolski

Autorzy:

Kasprzak, L.
Ewertowski, M.
Szuman, I.

Powiązania:

https://bibliotekanauki.pl/articles/294982.pdf

Data publikacji:

2011

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

Weichselian ice sheet
glacial sediments and landforms
Polska

Opis:

Glacial environment is characterised by a very wide variety of sediments. In contrast to other sedimentary environments it is difficult to determine the leading unit. Therefore, more often the complexes of sediments and forms are examined, rather than individual facies indicator. The aim of this paper is to present a diversity of forms and sediments in Wielkopolska (in selected study area, which will be presented during the excursion) with an attempt to interpret their sedimentary environment. The authors do not concentrate on discussion about the importance of frontal or areal deglaciation in the formation and differentiation of forms and sediments. They emphasise the importance of depositional effectiveness.

Źródło:

Landform Analysis; 2011, 16; 155-186
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Terrestrial heat flow density in Poland - a new approach

Autorzy:

Szewczyk, J.
Gientka, D.

Powiązania:

https://bibliotekanauki.pl/articles/2059118.pdf

Data publikacji:

2009

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

alaeoclimate
Weichselian glaciation
well logging
geothermics
thermal conductivity
terrestrial heat flow density

Opis:

The Earth’s thermal field, particularly the heat flow density (HFD), is a valuable source of information on geodynamic processes within the Earth’s crust, conditions for hydrocarbon generation and on ar eas and formations promising for geothermal energy. Lithospheric thermal and rheological modelling is critically dependent on high-quality surface heat flow values. The available maps of heat flow density, not only for the area of Poland, are not reliable from the point of view of the current state of knowledge. The main critical factorin determining heat flow density is the knowledge of depth distribution of thermal conductivity. We used a new method of estimating the thermal conductivity from well logging data interpretation with control calibration based on laboratory determined thermal parameters. We con sider that the observed vertical variations of HFD in the shallow part of profiles (<2000 m) are mainly due to a Holocene warming. We have proposed a new original method of determination of HFD based on modelling of palaeoclimatic ef fect. Using this method, we have calculated new HFD values for 308 deep boreholes and completed a new map of this parameter for Poland, which is the first of this type. We propose to undertake a critical analysis of all the existing heat flow data not only for Europe that may change the present understanding of global heat flow.

Źródło:

Geological Quarterly; 2009, 53, 1; 125-140
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Middle and Upper Weichselian Pleniglacial fluvial erosion and sedimenta- tion phases in Southwestern Poland, and their relationship to Scandinavian ice sheet build-up and retreat
Fazy sedymentacyjne i erozyjne środkowego i górnego plenivistulianu oraz ich związek z transgresją i regresją lądolodu skandynawskiego w południowo-zachodniej Polsce

Autorzy:

Krzyszkowski, D.
Kuszell, T.

Powiązania:

https://bibliotekanauki.pl/articles/191674.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Geologiczne

Tematy:

Pleistocene
Weichselian
fluvial erosion and sedimention
pollen analysis
14C dating
SW Poland

Opis:

The sequence of Weichselian sediments and processes in SW Poland is almost identical to that of central Poland. Generally, three fluvial units occur, comprising silts and sands coarsening upwards to silts, sands and gravels, with aeolian deposits on top. This suggests very uniform processes throughout the palaeogeographic zone. To the south of this zone, there was extensive loess deposition and glacial deposition to the north. Climatic conditions during the Middle and Upper Weichselian Pleniglacial in SW Poland were similar to those in central Poland and northwestern Europe, though the period of 47-43 kyrs BP was slightly milder in SW Poland (shrub tundra, forest-tundra). Climatic conditions during the periods 38-27 kyrs BP and 23-18 kyrs BP were very uniform throughout central Europe, including SW Poland, though there may have been a strong north-south climatic gradient during the former period, as data from the loessic zone indicate at least patches of boreal forest or forest-tundra conditions in SW Poland at that time. It is also possible that there was a Middle Weichselian Pleniglacial interstadial with a lower age boundary at 25,900 ą 700 years BP, characterised by Pinus-Picea forest with no heliophytes. This interstadial represents the last mild period before the advance of the late Weichselian ice sheet into SW Poland. The Weichselian fluvial deposition of SW and central Poland may have been punctuated by at least three major erosional phases, characterised by similar incision depths during the cold stages. Erosion took place, with certainty, at around 75-60 kyrs BP (Lower Pleniglacial) and 27 kyrs BP, very probably at around 23/22 kyrs and possibly at around 40 kyrs BP, and valley aggradation occurred during the milder stages. The Upper Pleniglacial was characterised by valley aggradation, associated with southward ice sheet advance and restricted fluvial outflow. However, the frequent Middle Pleniglacial Weichselian climatic oscillations did not initiate sedimentation and erosion, they controlled only river discharge and type of fluvial sedimentation and aeolian activity. The occurrence of the erosional and aggradational phases were controlled by the changes in ice volume in Scandinavia, ice sheet build-up and retreat, respectively.

Źródło:

Annales Societatis Geologorum Poloniae; 2007, 77, No 1; 17-38
0208-9068

Pojawia się w:

Annales Societatis Geologorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Diamicton in Besiekierz (Central Poland) : how to avoid misinterpretation of superposition in Quaternary geology

Autorzy:

Czubla, P.
Forysiak, J.
Twardy, J.

Powiązania:

https://bibliotekanauki.pl/articles/2060312.pdf

Data publikacji:

2013

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

stratigraphy
Weichselian
diamicton
indicator erratics
tillage erosion

Opis:

Diamicton in Biesiekierz (central Poland), whose age and origin has long provoked debate, is located above unquestionable Eemian biogenic deposits documented by palynological and Cladocera analyses. Petrographically, this diamicton shows some similarities to Warthanian till. Lithologically, it shows considerable weathering of the deposit, a possible selection of the component minerals and addition of dispersed biogenic matter. The results obtained so far as well as the palaeomorphological situation indicate that the diamicton is reworked till material, as are sand intercalations within it. Given the organic content of this diamicton, we infer that a long-term agricultural exploitation of its immediate surroundings was the main factor behind colluvial reworking and displacement occurring above the Eemian biogenic deposits in the fossil depression.

Źródło:

Geological Quarterly; 2013, 57, 4; 629--636
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 27.

Tytuł:

Sedimentary record of a Pleistocene ice-sheet interlobate zone (NE Poland)

Autorzy:

Gruszka, Beata
Morawski, Wojciech
Zieliński, Tomasz

Powiązania:

https://bibliotekanauki.pl/articles/94281.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

interlobate sedimentation
outwash deposits
esker
Weichselian
NE Poland
sedymentacja
osady sandrowe
oz
Polska Północna

Opis:

Well developed NE-SW trending corridors of outwash in NE Poland are associated with a series of lakes with a similar direction of elongation. The glaciofluvial corridor under study consists of parallel ridges with associated channels and kames. The deposits are flanked by till and hummocky terrain. The gravel ridges are composed of sand and gravel deposits that are cross-stratified, massive or graded, and that contain cut-and-fill structures and large intra-clasts of sand and gravel. Locally the deposits show normal faults. The succession of one of the ridges is interpreted to reflect the infilling of a braided channel in a crevasse. Sedimentation took place in some phases when the ice-sheet regime changed from active to stagnant. Sandy-gravel ridges occur within this complex perpendicular to the Weichselian icesheet margin. The corridor is interpreted as an interlobate area in the zone between the Warmia and Mazury ice lobes. The braided-channel deposits are not comparable to typical Polish sandurs. The lithofacies characteristics show higher energy conditions, and the channels are deeper than those typical of Pleistocene lowland sandurs. The sand and gravel ridges are interpreted as interlobate eskers.

Źródło:

Geologos; 2012, 18, 2; 65-81
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 28.

Tytuł:

Kame or moraine? A sedimentological study of a glaciomarginal landform at Niedźwiedziny (Great Polish Lowland)

Autorzy:

Ewert-Krzemieniewska, A.

Powiązania:

https://bibliotekanauki.pl/articles/94579.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

sedimentology
glaciomarginal zone
kame
Weichselian
Middle Poland
sedymentologia
strefa glacimarginalna
kem
Środkowa Polska

Opis:

A sedimentary succession in a gravel pit at Niedźwiedziny was investigated in order to determine its origin: kame or moraine. The gravel pit is located in an isolated hill of approx. 600 m long and 250–400 m wide. The succession is built of glaciofluvial deposits: a sandy/gravelly unit in the lower and middle parts, overlain by diamicton. Five lithofacies have been distinguished, which represent two facies associations: (1) a fluvial association evolving from a high-energy to a transitional to a shallow braided river on an alluvial fan, and (2) an association of cohesive deposits representing a glacigenic mass flow. The interpretation is based mainly on palaeocurrent data and differs from conclusions by earlier investigators. The ice-marginal zone is characterised by a large variety of glaciomarginal forms. Their sedimentology, morphology and palaeogeography are determined by successive phases of deglaciation. The results of the present study show that the character of the deglaciation in the study area changed with time from frontal to areal deglaciation.

Źródło:

Geologos; 2014, 20, 3; 167-181
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Middle Weichselian Pleniglacial sedimentation in the Krasówka river palaeovalley, central Poland

Autorzy:

Wachecka-Kotkowska, L.
Krzyszkowski, D.
Klaczak, K.
Król, E.

Powiązania:

https://bibliotekanauki.pl/articles/191210.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Geologiczne

Tematy:

alluvial deposits
MIS 3
sedimentary petrology
AMS
palynology
radiocarbon dates
Bełchatów mine

Opis:

This study from the Szczerców field of the Bełchatów open-cast mining complex, central Poland, reveals the local geomorphic and stratigraphic history of the Krasówka river palaeovalley – a major western tributary of the river Widawka. The data are from the western flank of the N-trending palaeovalley and the study combines detailed lithofacies analysis of outcrop sections, sediment petrology, AMS measurements and palynological evidence. Radiocarbon dates are of crucial importance for the reconstruction of the palaeovalley history. The study contributes to a better understanding of the response of the Central European river systems to the Vistulian Pleniglacial conditions. The Vistulian Pleniglacial sedimentation in the study area commenced with the accumulation of the latest Eemian to earliest Weichselian (≥45 ka) deposits by sheetwash processes in a local karstic topographic depression. The Krasówka river then formed to the east and shifted farther eastwards, but later approached twice the study area with a net aggradation prior to 43 ka BP – flooding it with overbank deposits. The river subsequently incised by nearly 20 m around 40 ka BP and began to fill in its valley by aggradation around 35 ka BP, while migrating eastwards and markedly decreasing its flooding capacity from 33 to 24 ka BP. The fluvial system was rejuvenated around 21 ka BP, with some initial erosion, and kept filling its valley by aggradation while flooding the valley flank. The river after filling its valley continued to aggrade, but gradually ran out of vertical accommodation and migrated westwards. The fluvial activity at this stage was increasingly accompanied by aeolian sedimentation. Once the Mid-Weichselian Pleniglacial came to an end around 14.5 ka BP, the Krasówka river had re-incised by nearly 5 m and assumed its present-day altitude in response to the post-glacial regional isostatic rebound of crustal basement.

Źródło:

Annales Societatis Geologorum Poloniae; 2014, 84, 4; 323-340
0208-9068

Pojawia się w:

Annales Societatis Geologorum Poloniae

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 30.

Tytuł:

Paleogeograficzne uwarunkowania odpływu wód z zastoiska warszawskiego doliną Bachorzy i pradoliną warszawsko-berlińską w czasie stadiału głównego zlodowacenia Wisły
Paleogeographical conditions of the outflow from the Warsaw ice-dammed lake through the Bachorza valley and the Warsaw-Berlin pradolina during the Main Stage of the Weichselian Glaciation

Autorzy:

Molewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/294968.pdf

Data publikacji:

2013

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

dolina marginalna Bachorzy
pradolina warszawsko-berlińska
zastoisko warszawskie
zlodowacenie Wisły
Bachorza ice-marginal valley
Warsaw-Berlin pradolina
Warsaw ice-dammed lake
Weichselian glaciation

Opis:

Autor przedstawia nową koncepcję odpływu wód z zastoiska, które utworzyło się w Kotlinie Warszawskiej podczas stadiału głównego ostatniego zlodowacenia. Podstawową, dyskutowaną kwestią jest możliwość odpływu tych wód pradoliną warszawsko-berlińską, w świetle współczesnych stosunków hipsometrycznych w jej wschodnim odcinku. Opracowany nowy schemat zasięgów lądolodu stadiału głównego zlodowacenia wisły umożliwia w starszej fazie tego stadiału (fazie leszczyńskiej) odpływ wód z zastoiska z pominięciem jej wschodniego odcinka przez dolinę Bachorzy. Autor rozważa również rolę halokinezy w zmianie stosunków hipsometrycznych we wschodniej części pradoliny warszawsko-berlińskiej.
The author presents a new concept of the outflow from the ice-dammed lake that formed in the Warsaw Basin during the Main Stage of the last glaciation. The basic issue under discussion is the possibility of the outflow along the Warsaw-Berlin pradolina in the light of the contemporary hypsometric relations in its eastern section. A new scheme of the ice sheet ranges during the Main Stage of the Weichselian Glaciation reveals that during the older phase of this stage, the Leszno Phase, the outflow from the ice-dammed lake was possible through the Bachorza valley, i.e. omitting the Ice-marginal Valley’s eastern section. The author also considers the role of halokinesis in changing the hypsometrical conditions in the eastern part of the Warsaw-Berlin pradolina.

Źródło:

Landform Analysis; 2013, 25; 105-114
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 31.

Tytuł:

Sedimentological features and depositional conditions of accumulative fans in the lower Serteyka River valley, Western Russia

Autorzy:

Piech, Wiktor

Powiązania:

https://bibliotekanauki.pl/articles/2037000.pdf

Data publikacji:

2021-12-23

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

slope processes
deluvia
denudation valleys
erosion cuts
sediment lithodynamics
Late Weichselian
Holocene
Little Ice Age

Opis:

In the Serteyka River valley in western Russia, eight accumulative fans formed at the mouths of ravines were examined geologi-cally and geomorphologically. The test samples were collected from individual geological drillings made with a manual probe, as well as from excavations in the central and distal zones of the fans. Using the Gradistat program, sedimentological indicators were calculated, i.e. mean grain diameter (MZ), standard deviation (sorting – σI), skewness (SkI) and kurtosis (KG),and then particle-size distribution frequency curves, cumulative curves and a Passega C/M diagram were drawn. It has been documented that the grain size of the fan sediments depends on the characteristics of the source material. Analysis of sedimentological indicators (mean grain diameter, sorting, skewness, kurtosis) showed the studied fans deposits to have a large variability of erosion and accumulation conditions. For the deposits of younger fans, the 2nd system of the MZ-versus-σI relationship after Mycielska-Dowgiałło (1995) was distinguished, while for the older, the 2nd, 3rd and 4th systems were recognised. The main process of grain transport within these forms was saltation. The ravines on the eastern slope of the Serteyka valley were most likely created in the periglacial period, while the gullies on the western side of the valley developed in the early modern period.

Źródło:

Acta Geographica Lodziensia; 2021, 111; 159-188
0065-1249

Pojawia się w:

Acta Geographica Lodziensia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 32.

Tytuł:

Substratum morphology and significance during the Weichselian Odra ice lobe advance in northeast Germany and northwest Poland

Autorzy:

Hermanowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/94320.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

ice stream
last Scandinavian Ice Sheet
subglacial conditions
kriging
strumień lodowy
lądolód skandynawski
warunki subglacjalne

Opis:

In the Polish Lowlands, three main ice lobes, referred to as Odra, Vistula and Mazury, formed during the Last Scandinavian Glaciation. These lobes protruded at least several kilometres beyond the main ice margin and it is believed that they represent terminal parts of the ice streams. Applied geostatistical analysis based on numerous geological data has allowed an approximate reconstruction of the Odra ice lobe substratum in the area of northwest Poland and northeast Germany. A spatial representation of the Odra lobe substratum clearly illustrates the adverse slope of the glacier bed, but also indicates areas morphologically prone to ice streaming. It is suggested that the ice took advantage of local topography that enabled advance out of the Baltic basin; consequently, the ice followed a topographic low which, in combination with favourable hydraulic conditions of its substratum, likely initiated ice streaming.

Źródło:

Geologos; 2015, 21, 4; 241-248
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 33.

Tytuł:

The deep-seated lowland relict permafrost from the Suwałki region (NE Poland) : analysis of conditions of its development and preservation

Autorzy:

Szewczyk, J.

Powiązania:

https://bibliotekanauki.pl/articles/2060585.pdf

Data publikacji:

2017

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

relict permafrost
palaeoclimate
Weichselian Glaciation
terrestrial heat flow
cryogenic groundwater
Suwałki Anorthosite Massif

Opis:

The Udryń PIG 1 research borehole drilled in northeastern Poland (54°14’49”N, 23°03’29”E, 223 m a.s.l.) revealed a permafrost layer, at least 93 m thick, within the sedimentary succession below a depth of 357 m. The base of the permafrost has not been reached at 450 m depth, where the drilling stopped, so its total present thickness remains unknown. The relict permafrost, unexpected in this part of Central Europe, is in the ice-water transition phase at a temperature slightly below the 0°C. Analysis of geophysical and hydrogeological data indicates the possibility of preserving the permafrost in the central part of sedimentary cover of the Suwałki Anorthosite Massif over an area of probably 50 km2. Preliminary results of geothermal modelling indicate maximum palaeothickness of permafrost at the end of the Last Glacial Maximum of probably ~600 m. The development of such a thick permafrost results both from a very low average annual temperature in the Weichselian Glaciation and a very low terrestrial heat flow density. It is very probable that similar zones of deep relict permafrost occurrences, undetected so far, may exist in other areas of the Precambrian Platform not only in Poland, but also in the neighbouring countries.

Źródło:

Geological Quarterly; 2017, 61, 4; 845--858
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 34.

Tytuł:

Palaeoslopes of Weichselian sand-bed braided rivers in the Toruń Basin (Poland): results of a palaeohydraulic analysis

Autorzy:

Weckwerth, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/94207.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

palaeoslope
Shields parameter
sand-bed braided river
river terraces
central Poland
piaskodenna rzeka roztokowa
tarasy rzeczne
Polska centralna

Opis:

Palaeoslopes of Weichselian sand-bed braided rivers have been reconstructed for two stages of fluvial development in the Toruń Basin. (1) The palaeoslope of the ‘fossil’ fluvial succession (buried under Weichselian tills) was calculated on the basis of the median grain size and the Shields parameter. The hydraulic gradient thus found is comparable with the hydraulic gradient of the present-day river. (2) The second developmental stage of the Toruń Basin (as a apart of the Noteć-Warta ice-marginal valley) took place after deglaciation. The slopes of river terraces are a few times lower than those calculated on the basis of the Shields parameter. The palaeoslope of the then river was estimated on the basis of a constant interdependency between the braidplain width, the channel geometry and the grain size. The river gradient that was thus calculated is similar to the measured terrace slope. Palaeoslope estimates in valleys similar to those in the Toruń Basin should consider the width of the braidplain.

Źródło:

Geologos; 2011, 17, 4; 227-238
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 35.

Tytuł:

Palynology of Late Pleistocene varved clays from ice-dammed lakes at Lębork and Złocieniec (north-western Poland) - preliminary results

Autorzy:

Gedl, Przemysław

Powiązania:

https://bibliotekanauki.pl/articles/94298.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

palynology
varved clays
palaeoenvironment
Weichselian
Pleistocene
NW Poland
analiza pyłkowa
iły warwowe
paleośrodowisko
plejstocen
Polska północna

Opis:

Samples collected from Late Pleistocene varved clays of the Vistulian (Weichselian) glaciation exposed at Lębork and Złocieniec (Gardno and Pomeranian phases, respectively) yielded palynological contents that are related to the different lithologies composing the varves. The dark-coloured clay units contain very small amounts of palynological material. The lighter-coloured, much thicker coarser units yielded large amounts of organic particles consisting of predominantly palynodebris of terrestrial plants, sporomorphs and aquatic palynomorphs. The latter include fresh-water and marine phytoplankton. All particles were presumably washed out from the pre-Quaternary basement or from erratic material. This is indicated by the dinoflagellate-cyst assemblages, which represent Cretaceous and Palaeogene taxa. The large amounts of organic particles in the light-coloured layers indicate high-energy meltwaters streams, which washed them out, transported them and deposited them in ice-dammed lakes. The barren layers and those with lower amounts of organic particles were deposited during calm, presumably winter, periods, when the energy of the meltwater streams was much lower.

Źródło:

Geologos; 2011, 17, 1; 49-59
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 36.

Tytuł:

The evolution of a Weichselian proglacial lake in NW Poland as revealed by static penetration tests

Autorzy:

Wierzbicki, Jędrzej
Paluszkiewicz, Renata
Paluszkiewicz, Ryszard

Powiązania:

https://bibliotekanauki.pl/articles/94539.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

glaciolacustrine deposits
varves
overconsolidation
CPTU method
Pomeranian Lakeland
Polska
osad glacjalny
prekonsolidacja
Pojezierze Pomorskie
Polska

Opis:

The lithology, structure and geophysical characteristics of the glaciolacustrine clays deposited in the Wierzchowo proglacial lake were determined using static penetration tests (CPTU) in combination with standard lithological measurements. The deposits are divided into four lithological units (R1 to R4) on the basis of overconsolidation. Units R3 and R4 are separated by mass-flow deposits. The depositional conditions history of the lake result represent four phases: (1) an initial (low-energy) phase with the deposition of the rhythmically laminated sediments of units R1 and R2, which are divided by an erosional interval; (2) a phase of non-deposition with some desiccation structures and extended consolidation of sediments; (3) the main phase characterised by deposition of the rhythmically laminated sediments of unit R3; and finally, (4) the youngest phase, which represents alternations of deposition and erosion. The results show that sedimentation in the Wierzchowo proglacial lake was less continuous, and that the depositional processes were more complex than in the neighboring Złocieniec glacial lake.

Źródło:

Geologos; 2011, 17, 2; 111-119
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 37.

Tytuł:

Characteristic of till formation during the Baltija (Pomeranian) Stage of the Nemunas (Weichselian) Glaciation in Lithuania

Autorzy:

Baltrunas, V.
Karmaza, B.
Dundulis, K.
Gadeikis, S.
Račkauskas, V.
Šinkunas, P.

Powiązania:

https://bibliotekanauki.pl/articles/2059706.pdf

Data publikacji:

2005

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Lithuania
last glaciation
Nemunas Glaciation
Baltija till
sedimentology
physical properties

Opis:

Studies of the till structure and composition of the Baltija (Pomeranian) Stage of the Nemunas (Weichselian) Glaciation in Lithuania has enabled recognition of a multilayered till structure. This can be seen visually (colour, bed structure, interlayers, insertions of different composition and so on) and established from features determined by analytical and statistical methods (physical and mechanical properties, material composition, orientation and dip of longer axes of pebbles). Borehole log data from boreholes drilled during geological mapping showed heterogeneity within the subglacial till of the Baltija Stage and provided a preliminary picture of variations of its multilayered structure from S to N. This showed that two layers predominate in the subglacial till in the area of the South Lithuanian Phase while three layers are present in the area of the Middle Lithuanian Phase farther north. The petrographic composition of the gravel fraction as well as the orientation and dip of the long axes of pebbles measured in till beds in natural exposures and quarries further demonstrated the multilayered structure of the Baltija till. Research at key sections in areas of the subsurface extent of till of the East, South and Middle Lithuanian phases of the Baltija glacial recession confirmed the increase in the number of till layers from S to N. The physical and mechanical properties of the till also reflect its multilayered structure. Relative entropy values calculated for the grain-size frequency distribution of the Baltija till enabled evaluation of a change in its sorting along the direction of glacial ice advance from N to S. There is a correlation between the higher values of entropy of grain-size distribution and the rate of development of preferred orientation of longer axes of pebbles throughout the till section vertically. The formation of themultilayered structure of the Baltija till is ascribed to cyclic dynamics of the subglacial processes associated with the receding ice sheet; consequently, the number of subglacial till layers may be related to the marginal moraine ridges of different phases left by oscillation of the ice sheet margin during glacial recession.

Źródło:

Geological Quarterly; 2005, 49, 4; 417--428
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 38.

Tytuł:

O możliwościach rekonstrukcji paleotemperatur vistulianu na podstawie kopalnych zespołów ptaków
Reconstruction of Vistulian palaeotemperatures on the basis of fossil bird assemblages

Autorzy:

Lorenc, Michał

Powiązania:

https://bibliotekanauki.pl/articles/94241.pdf

Data publikacji:

2008

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

vistulian
paleotemperatura
osady jaskiniowe
szczątki kostne ptaków
Vistulian
Weichselian
palaeotemperature
cave sediments
bird bone remains

Opis:

Pochodzące z vistulianu szczątki ptaków znane są w Polsce niemal wyłącznie z osadów jaskiń i schronisk skalnych, w sumie z 18 stanowisk. Relatywnie liczne są wyłącznie szczątki pochodzące ze środkowego i późnego vistulianu. W artykule podsumowano zamieszczone w literaturze dane dotyczące występowania i zróżnicowania gatunkowego kości ptaków w vistuliańskich osadach powyższych 18 stanowisk. Zespoły ptaków z vistuliańskich osadów poszczególnych jaskiń i schronisk skalnych stanowiły często podstawę rekonstrukcji paleośrodowiska, rzadziej paleoklimatu. W artykule podsumowano średnie temperatury lipca, które na podstawie tych zespołów oszacowano do tej pory dla niektórych faz klimatycznych vistulianu. Większość temperatur określono używając metody obliczania wskaźników termicznych, według Demarcq & Mourer-Chauvire (1976) i przeliczania wartości tych wskaźników na °C, według Lorenca (2007). Metody te zostały ogólnie scharakteryzowane. Prezentowane temperatury odnoszą się do następujących faz klimatycznych vistulianu: późny vistulian (bölling, starszy dryas, alleröd, młodszy dryas), późny plenivistulian, środkowy plenivistulian (denekamp, hengelo), wczesny plenivistulian (schalkholz) i wczesny vistulian (odderade). Wskazano mocne i słabe strony rekonstrukcji paleotemperatur na podstawie powyższych zespołów ptaków.
Vistulian bird-bone remains are known in Poland almost exclusively from sediments of 18 caves and rockshelters in the Kraków-Częstochowa Upland, the Podhale Depression and the Holy Cross Mountains. Only remains from the Middle and Late Vistulian are relatively abundant. The present contribution summarizes literature data on the occurrence and species diversity of bird-bone remains from the 18 sites mentioned above. The bird-bone assemblages from the caves and rock-shelters were often used to reconstruct the then palaeoenvironment, more rarely the palaeoclimate. Analysis of the bird-bone assemblages indicates average July temperatures for some Vistulian intervals, viz. the Late Vistulian (Bölling, Older Dryas, Alleröd, Younger Dryas), Late Plenivistulian, Middle Plenivistulian (Denekamp, Hengelo), Early Plenivistulian (Schalkholz) and Early Vistulian (Odderade). Most of the temperatures were assessed through thermal indices (Demarcq & Mourer-Chauvire 1976), but they were estimated by Lorenc’s (2007) method as well. Both methods are explained in the present contribution. In addition, the advantages and disadvantages of palaeotemperature reconstruction on the basis of bird-bone assemblages are specified.

Źródło:

Geologos; 2008, 14, 1; 91-106
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 39.

Tytuł:

Is the Charlottenthal fan (marginal zone of the Pomeranian phase, NE Germany) an end moraine?

Autorzy:

Pisarska-Jamroży, Małgorzata
Börner, Andreas

Powiązania:

https://bibliotekanauki.pl/articles/94327.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

transitional fan
glaciofluvial sediment
gravel petrography
Weichselian glaciation
Pomeranian Phase
NE Germany
osady fluwioglacjalne
żwiry petrograficzne
Pomorze
północne Niemcy

Opis:

The maximum ice-sheet extent of a glaciation or glacial phase is in most cases indicated by the position of end moraines. In some cases, however, the maximum extent of the ice sheet is indicated by a fan which represents the transitional zone between the end moraine and the proximal outwash plain (sandur). Such a fan from the Pomeranian phase near Charlottenthal in NE Germany has been investigated for its lithofacies, and the depositional mechanisms of the two sedimentary environments (end moraine and outwash plain) are reconstructed. The Charlottenthal profile is not characteristic in a sedimentological sense of a typical marginal end moraine or a sandur. The deposits represent subaerial debris flows, sheet floods and channelized currents, which are typically processes for transitional fan. Gravel samples from the till complex show typical Weichselian till compositions. These till compositions indicate a general transport direction from North to South, which is consistent with the known movement of the ice sheet during the Pomeranian phase of the Weichselian.

Źródło:

Geologos; 2011, 17, 1; 17-28
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 40.

Tytuł:

Roundness and matt degree of quartz grain surfaces in (fluvio-)glacial deposits of the Pomeranian Stage (Weichselian) in northeast Germany

Autorzy:

Górska-Zabielska, M.

Powiązania:

https://bibliotekanauki.pl/articles/94355.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

textural analysis
quartz grain
Pomeranian Stage
Mecklenburg-Vorpommern
Uckermark
analiza tekstury
ziarna kwarcowe
Meklemburgia-Pomorze Przednie

Opis:

Glacial tills and fluvioglacial sediments deposited by the ice-sheet during the Pomeranian Stage (Weichselian) in northeast Germany have been examined in terms of the degree of abrasion, rounding and frosting of quartz grain surfaces in order to determine the conditions and processes that occurred in the alimentation environment of the fine-grained material, as well as during transport. Strata in the glaciomarginal zone and the hinterland of the Pomeranian Stage in the area represent diverse lithofacies, but have similar textural features. These features illustrate mainly that a high-energy aquatic environment had reacted with glacial deposits prior to their inclusion into the ice mass and deposited in the area covered by the Odra lobe. The lack of regional diversification in the character of quartz grain surfaces in glacial deposits between the German part of the Odra lobe and the remainder of the area analysed is recorded solely in the morphological dimension, i.e. the outlet fragment of the ice-front’s course, but not in textural features of the sediments.

Źródło:

Geologos; 2015, 21, 2; 117-125
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 41.

Tytuł:

Factors controlling sedimentation in the Toruń-Eberswalde ice-marginal valley during the Pomeranian phase of the Weichselian glaciation: an overview

Autorzy:

Pisarska-Jamroży, M.

Powiązania:

https://bibliotekanauki.pl/articles/94659.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

sedimentology
depositional mechanisms
palaeohydraulics
heavy minerals
sandur
Pleistocene
Polska
sedymentologia
mechanizmy depozycyjne
paleohydraulika
minerały ciężkie
sandr
plejstocen
Polska

Opis:

During the Pleistocene the Scandinavian ice sheet drained huge quantities of sediment-laden meltwaters. These meltwaters supplied ice-marginal valleys that formed parallel to the front of the ice sheet. Not without significance was the supply of ice-marginal valleys from extraglacial rivers in the south. Moreover, periglacial conditions during and after sedimentation in ice-marginal valleys, the morphology of valley bedrocks, and erosion of older sediments played important roles in the depositional scenarios, and in the mineralogical composition of the sediments. The mechanisms that controlled the supply and deposition in ice-marginal valleys were analysed on the basis of a Pleistocene ice-marginal valley that was supplied by northern and southern source areas in the immediate vicinity. Investigations were conducted in one of the largest ice-marginal valleys of the Polish-German lowlands, i.e., the Toruń-Eberswalde ice-marginal valley, in sandurs (Drawa and Gwda) supplied sediments and waters from the north into this valley, and on extraglacial river terraces (pre-Noteć and pre-Warta rivers), formed simultaneously with the sandurs and ice-marginal valley (Pomeranian phase of Weichselian glaciation) supplied sediments and waters from the south into this valley. A much debated question is how similar, or different, depositional processes and sediments were that contributed to the formation of the Toruń-Eberswalde ice-marginal valley, and whether or not it is possible to differentiate mostly rapidly aggraded sandur sediments from ice-marginal valley sediments. Another question addresses the contribution of extraglacial feeding of the Toruń-Eberswalde ice-marginal valley. These matters were addressed by a wide range of analyses: sediment texture and structure, architectural elements of sediments, frequency of sedimentary successions, heavy-mineral analysis (both transparent and opaque heavy minerals), analysis of rounding and frosting of quartz grains, and palaeohydrological calculations. Additionally, a statistical analysis was used. The specific depositional conditions of distribution of sediments in ice-marginal valley allow to distinguish new environment of ice-marginal valley braided river. The spectrum of depositional conditions in the Toruń-Eberswalde ice-marginal valley and their specific palaeohydraulic parameters allow to distinguish three coexisting zones in the ice-marginal valley braided-river system: (1) deep gravel-bed braided channel zone with extensive scours, (2) deep sand-bed braided channel zone with transverse bars, and (3) marginal sand-bed and gravel-bed braided channel zone with diamicton and breccia deposition, which were characterised in detail. Some of the results have been published previously, which is why they are discussed in the present paper within the context of new data.

Źródło:

Geologos; 2015, 21, 1; 1-29
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Stan wiedzy o późnym vistulianie w regionie łódzkim
State of knowledge about the Late Vistulian (Weichselian late glacial) in the Łódź Region)

Autorzy:

Dzieduszyńska, Danuta

Powiązania:

https://bibliotekanauki.pl/articles/578371.pdf

Data publikacji:

2013

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

schyłek plejstocenu
środowiska morfogenetyczne
paleogeografia
chronostratygrafia
denudacja
agradacja
Pleistocene decline
morphogenetic environments
palaeogeography
chronostratigraphy
denudation
aggradation

Opis:

Artykuł przedstawia stan rozpoznania paleogeograficznego późnego vistulianu w regionie łódzkim. Dla środowisk sedy-mentacyjnych: fluwialnego, stokowego i eolicznego, wyróżniono tendencje przebiegu agradacji i degradacji oraz scharakte-ryzowano zachowane dowody geologiczne i morfologiczne. Procesy morfogenetyczne zostały odniesione do globalnych, szybkich zmian klimatycznych okresu przejściowego plejstocen-holocen i zróżnicowanych warunków lokalnych. Zwrócono uwagę na niejednolitość stosowania terminu „późny vistulian”, zależnie od podziału stratygraficznego bądź dla obszarów glacjalnych, bądź ekstraglacjalnych. Podkreślono postęp, jaki dokonał się w rejestracji świadectw późnego vistulianu. W kontekście przyrastającej ilości danych z badań interdyscyplinarnych rysuje się możliwość konstrukcji regionalnego mo-delu rozwoju środowiska.
The article presents the palaeogeographical recognition of the Late Vistulian in the Łódź Region. For three sedi-mentary environments – fluvial, slope and aeolian – tendencies of aggradation and degradation have been identified and preserved geological and morphological evidences have been characterized. Morphogenetic processes have been related to global climatic changes of the Pleistocene-Holocene transition and varying local conditions. Attention was drawn to non-uniformity in the application of the term “Late Vistulian”, depending on the stratigraphical division, or to glacial or extragla-cial areas. The progress that has been made in the registration of the Late Vistulian processes is emphasized. In view of the increasing data of interdisciplinary research, the construction of a regional model for the environmental development is pos-sible in the nearest future.

Źródło:

Acta Geographica Lodziensia; 2013, 101; 25-36
0065-1249

Pojawia się w:

Acta Geographica Lodziensia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Unravelling the complex nature of the Upper Weichselian till section at Gdynia Babie Doły, northern Poland

Autorzy:

Woźniak, P. P.
Czubla, P.

Powiązania:

https://bibliotekanauki.pl/articles/94576.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

subglacial processes
till fabric
till petrography
Gulf of Gdańsk
Pleistocene
Fennoscandian Ice Sheet
procesy podlodowcowe
Zatoka Gdańska
Pleistocen
pokrywa lodowa

Opis:

The complexity of glacial sequences may increase when these formed underneath ice sheets despite subsequent changes in their extent that are accompanied by alterations in the direction of the ice flow. Our aim was to determine whether or not changes in ice sheet dynamics during the Late Weichselian are also recorded in sediments formed north of the area of its fluctuating margin (i.e., where the ice sheet prevailed independent of such fluctuations). It is shown that in these areas such a record could have occurred, as documented by results of till studies at Babie Doły. The examination was carried out using several analyses: lithofacies properties of sediments, petrographic till composition (fine gravel fraction, indicator erratics), till matrix CaCO3 content, till fabric, as well as orientation of striae on the top surfaces of large clasts. In parallel, datings of sub- and supra-till sediments using the TL method were carried out. The basal till at Babie Doły represents almost the entire Upper Weichselian, but it can be divided into subunits whose features indicate different ice flow directions and debris supply. The lower subunit developed as a result of the palaeo-ice stream along the main axis of the Baltic Sea (from the north), expanding to areas adjacent to the depression of the Gulf of Gdańsk. The upper subunit developed when the influence of the palaeo-ice stream in the study area decreased, the main role having been taken over by the ice flowing from the northwest. The till analysed also shows considerable lateral variation, indicative of the mosaic nature of subglacial sedimentation. We consider the diversity of permeability of deposits over which the ice sheet extended to be the prime factor that determined such a situation.

Źródło:

Geologos; 2016, 22, 1; 15-32
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 44.

Tytuł:

The lower reaches of the Nemunas River at the end of the Last (Weichselian) Glacial and beginning of the Holocene

Autorzy:

Bitinas, A.
Druzhinina, O.
Damušytė, A.
Napreenko-Dorokhova, T.
Guobytė, R.
Mažeika, J.

Powiązania:

https://bibliotekanauki.pl/articles/2060341.pdf

Data publikacji:

2017

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Baltic Sea
Nemunas Delta
Ancylus Lake
palaeogeography
hydrography
archaeology

Opis:

The Russian–Lithuanian cross-border area around the Nemunas and Šešupė rivers confluence is a key area for solving palaeogeographic issues important for this region: when the Nemunas Delta started to form, why the essential changes of hydrographic network occurred, and so on. The results of conventional radiocarbon (14C) dating and pollen analysis in the present dry valley between the Šešupė River and the Įrutis River as well as the results of former studies at the Riadino-5 archaeological site suggest that the essential changes in the Nemunas River hydrographic system occurred before 9.5 ka, most likely in Preboreal time, when the Nemunas River cut through the Vilkiškė Marginal Ridge and started to flow directly to the west from this ridge into one of the former basins of the Baltic Sea – to the Yoldia Sea, or to the Ancylus Lake. A new divide was formed between the Šešupė and Įsrutis rivers, and the basins of the Nemunas and Prieglius rivers (formerly a single hydrographic system) became two independent drainage basins of the Baltic Sea. The present Nemunas Delta formation started after the Litorina Sea transgression when the Nemunas River mouth moved from a Baltic Sea nearshore position to close to the western margin of the Vilkiškės Marginal Ridge. A set of palaeogeographic reconstructions of the Nemunas and Šešupė rivers confluence area for different periods of the very end of the Last (Weichselian) Glacial and the beginning of the Holocene have been constructed.

Źródło:

Geological Quarterly; 2017, 61, 1; 156--165
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Unikalne stanowisko szczątków mamuta na Dolnym Śląsku
Unique site of the mammoth remains in the Lower Silesia

Autorzy:

Wiśniewski, A.
Wojtal, P.
Krzemińska, A.
Zych, J.
Przybylski, B.
Badura, J.
Ciszek, D.

Powiązania:

https://bibliotekanauki.pl/articles/2074685.pdf

Data publikacji:

2009

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

mamut
vistulian
środowisko peryglacjalne
Dolny Śląsk
mammoth
Weichselian glaciation
periglacial environment
Lower Silesia

Opis:

Aunique set of mammoth bones and tusk was found in active gravel pit in vicinities of Zastruże near Żarów, Lower Silesia. The use of archaeological methods made it possible to uncover 17 bones belonging to a single individual (Mammuthus primigenius). This is the first record of so complete set of mammoth bones in the Lower Silesian region. Mammoth remains were found to be accompanied by some bones of a horse and a flint artifact. The mammoth bones were dated radiocarbon method at 23 790 š 160 years, that is at the beginning of the last Pleniglacial of the Weichselian Glaciation. The mammoth remains were embedded in slope sediments of a small valley so they did not occurin anatomical order.

Źródło:

Przegląd Geologiczny; 2009, 57, 3; 234-242
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:

Sygnały zmian środowiskowych późnego vistulianu w archiwach biogenicznych regionu łódzkiego
Signals of environmental changes of the Late Vistulian (Weichselian late glacial) in biogenic sediments of the Łódź Region)

Autorzy:

Dzieduszyńska, Danuta
Forysiak, Jacek

Powiązania:

https://bibliotekanauki.pl/articles/578463.pdf

Data publikacji:

2013

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

naturalne archiwa
ekonstrukcja środowiska
badania interdyscyplinarne
paleogeografia
Polska Środkowa
natural archives
reconstruction of past environments
interdisciplinary research
palaeogeography
Central Poland

Opis:

W ostatnich latach znacząco zwiększyła się ilość danych będących źródłem informacji na temat środowiska późnego vistulianu. Jest to rezultat zwiększonego zainteresowania badaniami osadów biogenicznych, zwierających szczątki organiczne pozwalające na rekonstrukcje warunków środowiska przyrodniczego. Cennym naturalnym archiwum są te profile ze zbiorników akumulacji bioge-nicznej, w których zarejestrowana została zmienność tego okresu zarówno pod względem ekologicznym, jak i zróżnicowania procesów morfogenetycznych. W artykule przedstawiono stanowiska regionu łódzkiego posiadające najpełniejszą dokumentację, opracowaną w ramach badań interdyscyplinarnych. Zwrócono uwagę na możliwości rekonstrukcyjne parametrów środowiska, jaką dają poszczególne analizy paleośrodowiskowe. Wskazano na przewagę stanowisk Polski Środkowej, w stosunku do stano-wisk strefy młodoglacjalnej, spowodowane wcześniejszym rozpoczęciem cyklu akumulacji biogenicznej.
In recent years, the amount of data, which yield information on the environment of the Late Vistulian, significant-ly increased. This is a result of increased interest of analyses of biogenic deposits, containing organic remains which allow to reconstruct past environmental conditions. A valuable archive are these profiles of biogenic sediments in which variation in terms of both ecology and morphogenetic processes has been registered. The article overviews these sites of the Łódź region which provide the most complete record and were analysed within the framework of interdisciplinary studies. Attention is drawn to the possibility to reconstruct environmental parameters that give the individual paleoecological analyses. It was pointed that the sites of the Central Poland have an advantage over those from the young morainic area, due to the earlier start of the bioaccumulation.

Źródło:

Acta Geographica Lodziensia; 2013, 101; 37-48
0065-1249

Pojawia się w:

Acta Geographica Lodziensia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Pierwsze radiowęglowe (14C) datowania kości ssaków ze żwirowni w Krosinku (Wielkopolska)
First radiocarbon dating of mammal bones from the gravel-pit at Krosinko (Wielkopolska)

Autorzy:

Lorenc, M.
Pawłowska, K.

Powiązania:

https://bibliotekanauki.pl/articles/2074727.pdf

Data publikacji:

2010

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

materiały kostne
radiowęglowe datowania
żwirownia
vistulian
doliny lodowe-wtórne
bone sample
radiocarbon (AMS) dating
gravel pit
Warsaw-Berlin ice-marginal valley
Vistulian (Weichselian)

Opis:

4 mammal bone samples were radiocarbon (AMS) dated. The bones come from gravel-pit in Krosinko located in Warsaw-Berlin ice-marginal valley, 10 km south-west of Poznań. The ages of the dated bones samples differs considerably. The oldest bone sample comes from the beginning and the youngest one from the end of the Middle Plenivistulian and the difference between them is about 20 000 years.

Źródło:

Przegląd Geologiczny; 2010, 58, 11; 1103-1106
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Reconstruction of sediment provenance and transport processes from the surface textures of quartz grains from Late Pleistocene sandurs and an ice-marginal valley in NW Poland

Autorzy:

Woronko, B.
Pisarska-Jamroży, M.
van Loon, A. J.

Powiązania:

https://bibliotekanauki.pl/articles/94315.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

quartz grain micromorphology
ice-marginal valley
sandur
Weichselian glaciation
Polska
mikromorfologia ziaren kwarcu
pradolina
zlodowacenie północnopolskie
Polska

Opis:

During the Pomeranian phase of the Weichselian glaciation (~17–16 ka), the Toruń-Eberswalde ice-marginal valley (NW Poland and easternmost Germany) drained water from the Pomeranian ice sheet, while intensive aeolian processes took place across Europe in the foreland of the Scandinavian ice sheet (‘European Sand Belt’). The micromorphology of the quartz grains in the Toruń-Eberswalde ice-marginal valley shows no traces of these aeolian processes, or only vague signs of aeolian abrasion. This is unique among the aeolian sediments in other Pleistocene ice-marginal valleys in this part of Europe. The study of the surfaces of the quartz grains shows that the supply of grains by streams from the south was minimal, which must be ascribed to the climate deterioration during the Last Glacial Maximum, which resulted in a decrease of the discharge of these extraglacial rivers to the ice-marginal valley.

Źródło:

Geologos; 2015, 21, 2; 105-115
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Changes in habitat conditions in a Late Glacial fluviogenic lake in response to climatic fluctuations (Warta River valley, central Poland)

Autorzy:

Forysiak, Jacek
Okupny, Daniel
Obremska, Milena
Antczak-Orlewska, Olga
Płóciennik, Mateusz
Pawłowski, Dominik
Baradyn, Daria
Kotrys, Bartosz
Luoto, Tomi P.
Nevalainen, Liisa
Borówka, Ryszard K.

Powiązania:

https://bibliotekanauki.pl/articles/13955341.pdf

Data publikacji:

2023

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

multi-proxy analysis
Late Weichselian
denudation processes
palaeoclimate
central European river

Opis:

The Warta River valley was greatly influenced by the ice sheet of the Last Glacial Maximum (LGM). A small peatland located in the Warta drainage system is here used as a palaeoarchive of climatic and habitat changes during the Late Glacial (Weichselian). The Ługi sediment profile was investigated using multi-proxy (pollen, Chironomidae, Cladocera and geochemistry) analyses that recorded changes in a fluviogenic sedimentary depression. After the Poznań Phase (LGM), Ługi functioned as an oxbow lake that was cut off from the active river channel as a result of fluvial erosion. Since that time, the Warta River has flowed only along the section now occupied by the Jeziorsko Reservoir. Sedimentation of lacustrine deposits started at the beginning of the Late Glacial. Summer temperature reconstructions indicate cool Oldest and Younger Dryas, but no clear cooling in the Older Dryas. During the Younger Dryas the palaeolake was completely occupied by a peatland (fen), which periodically dried out during the Holocene. Investigation of this site has tracked the reaction of the habitat to climatic, hydrological and geomorphological changes throughout the Late Weichselian.

Źródło:

Geological Quarterly; 2023, 67, 1; art. no. 1
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Cechy denudacji w regionie łódzkim w późnym vistulianie w świetle chemicznych badań w osadach torfowiskowych
Denudation features of the Late Vistulian (Weichselian late glacial) preserved in the geochemical analysis of the biogenic deposits of the Łódź Region

Autorzy:

Okupny, Daniel
Fortuniak, Anna
Tomkowiak, Julita

Powiązania:

https://bibliotekanauki.pl/articles/578457.pdf

Data publikacji:

2013

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

torfowisko
osady biogeniczne
geochemia
denudacja
Polska Środkowa
peatland
biogenic deposits
geochemistry
denudation
Central Poland

Opis:

Przedstawiono charakterystykę geochemiczną wybranych torfowisk regionu łódzkiego (Ługi, Podwódka i Rąbień). Celem pracy jest określenie typów i natężenia denudacji w zlewni badanych zbiorników w późnym vistulianie. Miąższość udokumentowanych osadów biogenicznych wynosiła: 2,66 m (profil R-3), 3,0 m (profil Ł-1) oraz 4,75 m (profil P-1). Badania geochemiczne obejmowały oznaczenie podstawowych składników tych osadów, tj. materię organiczną, węglan wapnia, krzemionkę terygeniczną i biogeniczną. Metodą spektrometrii absorpcji atomowej oznaczono pierwiastki pomocne w rekonstrukcji paleograficznej: Na, K, Ca, Mg i Zn. W analizie przemian typów denudacji zlewni, jakie panowały podczas depozycji osadów, wykorzystano wskaźniki geochemiczne odzwierciedlające najważniejsze zmiany w proporcjach oznaczonych elementów
The paper presents the geochemical description of selected peatlands of the Łódź region: Ługi, Podwódka and Rąbień. The aim of this study is evaluation of the type and intensity of the Late Wechselian processes in the peatland catch-ment. The thickness of the document biogenic sediments in the profiles analyzed was: 2,66 m (core R-3), 3,0 m (core Ł-1) and 4,75 m (core P-1). The objective of the geochemical analyses of the above peatlands was identification of basic compo-nents of biogenic sediments, i.e. organic matter, calcium carbonate, terigenic and biogenic silica. In the resulting solution, elements helpful in palaeogeographical reconstruction were identified by the method of atomic absorption spectroscopy: Na, K, Ca, Mg and Zn. The analysis of types of denudation in the catchment following geochemical indices reflecting the most important changes in contribution of marked elements.

Źródło:

Acta Geographica Lodziensia; 2013, 101; 89-99
0065-1249

Pojawia się w:

Acta Geographica Lodziensia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 51.

Tytuł:

Multi-proxy inferred hydroclimatic conditions at Bęczkowice fen (central Poland); the influence of fluvial processes and human activity in the stone age

Autorzy:

Płóciennik, Mateusz
Jakiel, Aleksandra
Forysiak, Jacek
Kittel, Piotr
Płaza, Dominik K.
Okupny, Daniel
Pawłowski, Dominik
Obremska, Milena
Brooks, Stephen J.
Kotrys, Bartosz
Luoto, Tomi P.

Powiązania:

https://bibliotekanauki.pl/articles/2037005.pdf

Data publikacji:

2021-12-23

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

peatland
palaeoecology
climate changes
Late Weichselian
Early Holocene
central Poland

Opis:

Fens have been forming in the river valleys of central Poland since the Bølling and went through a transformation from fully aquatic to semiterrestrial habitats during the Younger Dryas/Holocene transition. This drove plant and invertebrate communities and left a distinct pattern in chemical sediment composition, which is why river valley peatlands are sensitive palaeo-archives of climatic, hydrological and edaphic changes. Here we reconstruct the Late Weichselian history of the Bęczkowice fen in the upper Luciąża River valley using geochemical, pollen, Cladocera and Chironomidae proxies. Pollen-based age estimation indicates that the analysed peat sequence dates from the Bølling to Early Holocene. The layers 190-170 cm and 125-105 cm of the studied core were reworked by fluvial processes. Chironomidae and Cladocera communities indicate mostly limnetic conditions during the Allerød and early Younger Dryas. Peatland pools were supplied mostly by Luciąża River floods, but also by groundwater. Since the onset of the Holocene, the water level has dropped, eliminating aquatic midges and water fleas, and supporting taxa typical of astatic waters and wet soil.

Źródło:

Acta Geographica Lodziensia; 2021, 111; 135-157
0065-1249

Pojawia się w:

Acta Geographica Lodziensia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 52.

Tytuł:

Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland

Autorzy:

Zieliński, P.
Sokołowski, R. J.
Fedorowicz, S.
Woronko, B.
Hołub, B.
Jankowski, M.
Kuc, M.
Tracz, M.

Powiązania:

https://bibliotekanauki.pl/articles/94513.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

climate change
periglacial environment
fluvial processes
aeolian processes
luminescence dating
zmiana klimatu
środowisko peryglacjalne
procesy fluwialne
procesy eoliczne
datowanie luminescencyjne

Opis:

Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.

Źródło:

Geologos; 2016, 22, 2; 105-120
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 53.

Tytuł:

Uwarunkowania rozwoju pogrązów w aluwiach doliny Wisłoka w okolicach Rzeszowa (południowo-wschodnia Polska)
Conditions for the development of load-cast structures in alluvial sedi- ments of the Wisłok River valley near Rzeszów (south-eastern Poland)

Autorzy:

Superson, J.
Brzezińska-Wójcik, T.
Gębica, P.

Powiązania:

https://bibliotekanauki.pl/articles/2075041.pdf

Data publikacji:

2013

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

load-cast structures
alluvial sediments
Wislok river valley
Weichselian glaciation
south-eastern Poland
pogrązowe struktury
osady aluwialne
dolina Wisłoka
zlodowacenie Wisły
południowo-wschodnia Polska

Opis:

The article presents the results of geological and geomorphological research concerning load-cast structures outcropping in the alluvial terrace sediments of theWisłok River in the Fore-Carpathian Erosional Valley. Given the large dimensions of these structures, reaching 1.5 m in some places, as well as their strong accumulation and diversity (i.e. drop-like and pocket-like structures), the authors attempted to establish the environmental factors that had determined the development of the structures in periglacial deposits of the Weichselian Glaciation. The structures were analysed in two accessible outcrops where sediments are represented by flood rhythmite and organic deposits, overlain by channel sands. Sandy load-cast structures occur in flood rhythmite and loamy deposits. The formation of load-cast structures probably started due to earthquakes in the Upper Pleniglacial period. The various shapes of load-cast structures were constrained by the various physical properties of the sediments and the escape of water during the deformation process.

Źródło:

Przegląd Geologiczny; 2013, 61, 2; 127--132
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 54.

Tytuł:

Chronologia i zasięgi nasunięć lądolodu na obszarze lobu Wisły podczas stadiału głównego ostatniego zlodowacenia
Chronology and extents of ice sheet advances in the Vistula lobe area during the Main Stage of the Last Glaciation

Autorzy:

Wysota, W.
Molewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/2074848.pdf

Data publikacji:

2011

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

loby lodowcowe Wisły
strumień lodu Wisły
północno-centralna Polska
skandynawski lądolód
ostatnie zlodowacenie (LGM)
ostatnie zlodowacenie Wisły
Vistula ice lobe
Vistula ice stream
north-central Poland
Scandinavian Ice Sheet
last glacial maximum (LGM)
Late Weichselian glaciation

Opis:

During the maximum of the last glaciation the Vistula ice lobe was one of the key morphological elements at southern margin of the Scandinavian Ice Sheet in north-central Poland. The area of the Vistula ice lobe experienced two ice sheet advances of varied extent, the earlier one during the Leszno Phase and the younger one in the Poznań Phase. According to the authors, the limit of the Leszno Phase within the study area was much smaller than hitherto accepted and its age is estimated at about 20.5 ka BP. Significant ice sheet retreat was followed by an ice readvance during the Poznań Phase, overriding the extent of the Leszno Phase. The Poznań readvance reached the maximum limit in the Vistula ice lobe area about 18.5 ka BP. It is assumed that the rapid ice sheet transgression during the Poznań Phase (on average 400 m/a) and origin of the Vistula lobe were probably connected with activity of the palaeo-ice stream.

Źródło:

Przegląd Geologiczny; 2011, 59; 214-225
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 55.

Tytuł:

Zróżnicowanie facjalne glin jako wskaźnik fluktuacji ciśnienia wód subglacjalnych na kontakcie lodu i podłoża podczas zlodowacenia wisły w północnej części Pojezierza Dobrzyńskiego
Till facies diversity as an indicator of subglacial water pressure fluctuations at the ice/bed interface during Weichselian glaciation in N part of Dobrzyń Lakeland

Autorzy:

Narloch, W.
Wojciechowska, J. M.
Osowicka, A.
Wysota, W.
Piotrowski, J.A.
Sobiech, M.

Powiązania:

https://bibliotekanauki.pl/articles/294428.pdf

Data publikacji:

2013

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

glina subglacjalna
poślizg bazalny
deformacja podłoża
Pojezierze Dobrzyńskie
subglacial till
basal sliding
bed deformation
Dobrzyń Lakeland

Opis:

Badaniom sedymentologicznym poddano gliny lodowcowe fazy poznańskiej zlodowacenia wisły na dwóch stanowiskach terenowych (Przeszkoda i Obórki), zlokalizowanych w północnej części Pojezierza Dobrzyńskiego. Podczas ostatniego zlodowacenia obszar ten był pokryty lobem lodowcowym Wisły, którego rozwój był najprawdopodobniej determinowany przez wiślany strumień lodowy. W rekonstrukcji procesów formowania glin oraz mechanizmów ruchu lodu została zastosowana kompleksowa analiza glin, w tym: cech sedymentacyjnych, uziarnienia, składu petrograficznego, orientacji dłuższej osi głazików oraz analiza mikromorfologiczna. Analizowane gliny są masywne i warstwowane. Badania sugerują występowanie złożonych i czasowo zmiennych warunków pod lobem Wisły, prawdopodobnie spowodowanych przez fluktuacje ciśnienia wód subglacjalnych. Ruch lodu był wynikiem kombinacji deformacji podłoża i poślizgu bazalnego.
Sedimentological analyses were performed on glacial till of the Weichselian glaciation in two field sites (Przeszkoda and Obórki) which are located in northern part of the Dobrzyń Lakeland. During the last glaciation this area was covered by the Vistula ice lobe which development has been determined by the Vistula Ice Stream. A multi-proxy approach including a study of sedimentary features, grain size, petrographic composition, till fabric and till micromorphology was used in reconstruction of till formation and ice movement mechanisms. Analysed tills are massive and stratified. We suggest existing of complex and temporally variable conditions under the Vistula ice lobe, probably caused by subglacial water fluctuations. Ice movement was caused by a combination of bed deformation and basal sliding.

Źródło:

Landform Analysis; 2013, 25; 125-133
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 56.

Tytuł:

Rekonstrukcja zmian paleośrodowiskowych w eemskich zagłębieniach bezodpływowych przedpola lądolodu ostatniego zlodowacenia na przykładzie stanowiska Stara Maryśka II (Północne Mazowsze, Polska Centralna)
Paleoenvironmental changes reconstruction in the Eemian kettle holes of the last ice sheet glaciation foregrounds on the example of the Stara Maryśka II site (Northern Mazovia, Central Poland)

Autorzy:

Rychel, Joanna
Sieradz, Dominika
Massalska, Barbara
Standzikowski, Karol
Wasiluk, Radosław
Woronko, Barbara
Nawrocki, Jerzy

Powiązania:

https://bibliotekanauki.pl/articles/2204542.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

późny plejstocen
zagłębienie bezodpływowe
warunki peryglacjalne
maksymalny zasięg lądolodu zlodowacenia Wisły
Late Pleistocene
kettle hole
periglacial conditions
palaeoenvironmental changes
maximum limit of the Weichselian (Vistulian) ice sheet

Opis:

Odsłonięta w stanowisku Stara Maryśka II sukcesja osadowa obejmuje górną część interglacjału eemskiego po zlodowacenie wisły. Na podstawie ciągłości zapisu palinologicznego w osadach wypełniających zbiornik odtworzony został przebieg zmian klimatu i środowiska w okresie późnego plejstocenu (MIS5e-MIS2). Wyniki datowań metodą OSL pozwoliły wyróżnić okresy funkcjonowania warstwy czynnej wieloletniej zmarzliny podczas zlodowacenia wisły (MIS4- -MIS2), która jest wyznacznikiem warunków peryglacjalnych panujących przed czołem lądolodu. Oznaczony został również czas formowania się wydm w rejonie stanowiska.
The sedimentary succession exposed in Stara Maryśka II site includes last part of Eemian Interglacial (MIS 5e) to Late Weichselian (MIS2) deposits. On the base of the palynological record in the paleo-lake, the climate and environmental changes during MIS 5e were reconstructed. Optically stimulated luminescence dating of the sands pseudomorphoses of ice wegdes made it possible to distinguish periods of increased aeolian activity during the Weichselian glaciation.

Źródło:

Landform Analysis; 2022, 41; 53--68
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

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