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Wyświetlanie 1-15 z 20
Tytuł:
Glaciotectonics of Belar
Autorzy:
Karabanov, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059385.pdf
Data publikacji:
2000
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Belarus
Quaternary
glaciation
glaciotectonic
glaciodislocation
Opis:
Different glaciotectonic structures and landforms occur in the territory of Belarus: folded dislocations, glacial depressions, rafts and injective features. The largest folded glaciodislocation is 30 km long and 8-11 km wide, and glacial rafts are up to 1.5 km long and 20-25 m thick. Many glaciotectonic structures are clearly expressed in landscape. Most large folded glaciodislocations were formed during the Sozh (Warthe) Stage of the Dnieper Glaciation.
Źródło:
Geological Quarterly; 2000, 44, 1; 1-7
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of a circular structure in eastern Pomerania (northern Poland) : a hypothesis of its origin
Autorzy:
Uścinowicz, G. S.
Powiązania:
https://bibliotekanauki.pl/articles/2060338.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
circular structure
northern Poland
Neogene
Quaternary
Opis:
The possible existence of a circular structure in the Kościerzyna region (northern Poland) was suggested in two papers in the 1980s. The current studies were aimed at verifying this hypothesis. Analysis of a digital terrain model of the pre-Quaternary surface relief as well as of the present terrain revealed the existence of a large structure of ca. 50 km in diameter. Its geometry was established based on a model of the Neogene/Pliocene surface and identifiable lineaments. Its characteristic feature is the presence of rim-like forms, an internal plateau, and a “high” in the centre. The structure is estimated to date from before the Pleistocene. The circular structure has been reshaped by glacial erosion and accumulation, and is now buried under Quaternary deposits. The existence of the Kościerzyna circular structure was confirmed by conducted studies, but my hypothesis of an impact origin is still uncertain and needs to be confirmed by future research.
Źródło:
Geological Quarterly; 2017, 61, 1; 205--213
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Malacofauna of the Holsteinian lake deposits at Hrud II (Eastern Poland) and its palaeoecological significance
Autorzy:
Szymanek, M.
Powiązania:
https://bibliotekanauki.pl/articles/2058942.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Quaternary
Holsteinian
lake deposits
molluscs
palaeoenvironment
Opis:
Mollusc-bearing deposits at Hrud II (Eastern Poland) accumulated in the western part of a palaeolake of Holsteinian age (MIS 11). The faunal assemblage is typical of freshwater environments and presumably represents a part of the interglacial climatic optimum (Carpinus–Abies Zone). On the basis of its varied composition, the evolution of the water body is described. Reinterpretation of the data from the eastern part of the lake (Hrud I) and combining of the results from both sites enable a wider palaeoecological reconstruction. Fluctuations in lake level, water dynamics and changes in the aquatic vegetation are inferred from quantitative relations between selected molluscs, especially Lithoglyphus jahni, Valvata piscinalis and Bithynia tentaculata, which prevail in the deposits investigated. A predominance of Valvata piscinalis indicates a rise in water level, whereas the communities with abundant Bithynia opercula are typical of a more shallow lake with rich reed fields. Amelioration of the trophic conditions between the pre-optimal and optimal part of the Holsteinian Interglacial can also be recognised.
Źródło:
Geological Quarterly; 2012, 56, 1; 117-126
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential of kite aerial photography for Quaternary investigations in Poland
Autorzy:
Aber, J. S.
Gałązka, D.
Powiązania:
https://bibliotekanauki.pl/articles/2059377.pdf
Data publikacji:
2000
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Quaternary
aerial photography
kite
geomorphology
mapping
Opis:
Aerial photographs taken from kites provide a versatile and low-cost means to acquire high-resolution, large-scale imagery for special Quaternary investigations. Kite aerial photographs (KAP) are typically taken from heights of 50-150 m using light-weight automatic cameras. Pictures may be acquired in vertical and oblique vantages. Scanning of photographs and digital processing allow for resampling, enhancement, and analysis of images. We have utilized basic KAP at five sites in eastern and northern Poland in order to evaluate the potential of KAP for Quaternary investigations. Our preliminary results suggest that KAP may provide detailed and repetitive imagery of geomorphic conditions, soils, land cover/use, and other surface features related to Quaternary processes, landforms, and deposits. However, KAP will not replace conventional aerial photography for general survey and mapping purposes.
Źródło:
Geological Quarterly; 2000, 44, 1; 33-38
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First record of tempestites from Quaternary lacustrine deposits in the Ağrı Basin (Eastern Anatolia, Türkiye) : palaeoclimatological and palaeogeographic implications
Autorzy:
Üner, Serkan
Powiązania:
https://bibliotekanauki.pl/articles/27324244.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
tempestite
hummocky cross-stratification
Quaternary
Eastern Anatolia
Opis:
Several event layers have been identified in lacustrine deposits in the AErI Basin of Anatolia (E Türkiye). Sedimentological and palaeontological data newly indicate a storm-induced origin for some of them. The sedimentary structures in three sections, a few tens of metres apart from each other laterally, such as hummocky cross-stratification, wave-generated cross-bedding, parallel bedding, erosional surfaces, and graded bedding, which are considered characteristic of tempestites, are clearly present. Additionally, fining-upwards units and biogenic escape structures located at different levels of these sections indicate a similar origin. The vertical variations in layer thickness, grain size, and sedimentary structures in these sedimentary sections indicate fluctuating hydrodynamic conditions during deposition, while lateral decrease in the size and wavelength of the structures reflects deepening. This interpretation of storm-induced deposition is compatible with regional palaeoclimatological and palaeogeographical data, and is supported by evidence of Quaternary storm-induced sedimentation in adjacent lacustrine basins in the region.
Źródło:
Geological Quarterly; 2023, 67, 2; art. no. 13
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Glaciotectonic features in Lithuania
Autorzy:
Aleksa, P.
Bitinas, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059381.pdf
Data publikacji:
2000
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Lithuania
Quaternary
glaciotectonic
megablock
thrust fault
diapir
Opis:
Systematic investigations of glaciotectonic features in Lithuania started in 1994. The first glaciotectonic review map of Lithuania has been carried out as a constituent part of the glaciotectonic map of central Europe. Two groups of landforms linked with glaciotectonic structures (composite ridges and massifs, drumlins and flutings) have been distinguished. Distribution of the pre-Quaternary megablocks in the Quaternary deposits is presented also, and the number of megablocks composed of rocks of different age and lithology is directly proportional to their extension in the sub-Quaternary surface. The other more detailed investigations of glaciotectonic features in Lithuania are connected with regular geological mapping in scale of 1:50 000. Results of the first detailed studies of glaciotectonic features (folds, thrust faults, diapirs) investigated in two outcrops in southeastern Lithuania and in the Lithuanian maritime region are presented in the paper.
Źródło:
Geological Quarterly; 2000, 44, 1; 9-13
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probable root structures and associated trace fossils from the Lower Pleistocene calcarenites of Favignana Island, southern Italy : dilemmas of interpretation
Autorzy:
Uchman, A.
Ślączka, A.
Renda, P.
Powiązania:
https://bibliotekanauki.pl/articles/2060614.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ichnology
root structures
burrows
carbonates
Quaternary
Mediterranean Sea
Opis:
Two types of large, branched structures from the Lower Pleistocene (Calabrian) high-energy calcarenites of Favignana Island are described: Faviradixus robustus gen. et sp. nov. and Egadiradixus rectibrachiatus gen. et sp. nov. They may be interpreted as root structures of large plants, trees and trees or shrubs, respectively. The former taxon co-occurs with the marine animal trace fossils Ophiomorpha nodosa, Ophiomorpha isp., Thalassinoides isp. and Beaconites isp. The interpretation as root structures although tentative is probable and can be related to short emergence episodes for the formation of E. rectibrachiatus or to longer emergence, responsible for the discontinuity at the base of the overlying Tyrrhenian deposits, for F. robustus. Calcified root mats of smaller plants associated with the Tyrrhenian or younger emergence surfaces are common.
Źródło:
Geological Quarterly; 2012, 56, 4; 745--756
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stratigraphy of Late Quaternary deposits and their neotectonic record in the Konin area, Central Poland
Autorzy:
Stankowski, W.
Nita, M.
Powiązania:
https://bibliotekanauki.pl/articles/2058759.pdf
Data publikacji:
2004
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
eastern Wielkopolska
late Quaternary deposits
Eemian Interglacial
neotectonic
Opis:
During many years’ research, the stratigraphy of Quaternary deposits in the area surrounding Konin has elaborated. In the young Quaternary strata the Eemian fossil lakeland was established and the exposed Mikorzyn section was found. Previous geological and palynological analyses of the site prove a nearly complete sequence of Eemian and Vistulian deposits. Furthermore, archival records of drill cores indicate that older interglacial sediments may also have been deposited about 10 metres deeper in this particular area. To test this possibility, a relatively deep test borehole—Mikorzyn 1 was carried out in the distance about 70 metres only. The sedimentological and palynological core analyses prove the Eemian age of examined organic materials. The borehole, established only the presence of ca.10 m offset in the bottom part of the Eemian strata. This fact, as well as other faults and Tertiary coal injections into glacial sediments, confirmed the occurrence of neotectonic activity.
Źródło:
Geological Quarterly; 2004, 48, 1; 23--34
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Loess-like silts in the Beskid Mały and Beskid Makowski Mountains, Western Outer Carpathians
Autorzy:
Grzybowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/2059330.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Outer Carpathians
Quaternary
loess-like silts
stratigraphy
Opis:
Among the Quaternary deposits of the Beskid Mały and Beskid Makowski Mts. in southern Poland, loess-like silts occurring in the Skawa River valley and the Paleczka River valley are distinguishable by their high loess index values as well as by the presence of amphibole grains and by notable amounts of biotite grains. These silts originated by aeolian sedimentation during the younger Pleniglacial of the Vistulian, corresponding to the Younger Upper Loess. The amphibole and most of the biotite was derived from deflation of a glaciofluvial cover in the Carpathian forelands and Fore-Carpathian basins. They indicate the importance of northern winds in the Plenivistulian atmospheric circulation.
Źródło:
Geological Quarterly; 2001, 45, 1; 67-74
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stratigraphy and lithology of Quaternary sediments in the Kleczew region and in key sections of the eastern Wielkopolska Lowland, central Poland
Autorzy:
Widera, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059428.pdf
Data publikacji:
2000
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Wielkopolska Lowland
Quaternary
Pleistocene
stratigraphy
lithology
key section
Opis:
The stratigraphy and lithology of the Quaternary deposits of the Kleczew region are analysed in a regional context. They can be correlated with the Preglacial, Narevian(?), South Polish, Middle Polish and Vistulian Glaciations, and the Podlasian, Zbójno and Eemian Interglacials. Large glaciotectonic structures, commonly encountered in lignite mines, proved useful in correlating grey tills of the older Pleistocene glaciations. Lithology, stratigraphy, thickness and palaeomorphology of the Pleistocene sediments were presented in the key sites Konin-Marantów, Mikorzyn, Sławoszewek and in 6 borehole sections. A regional lithostratigraphic scheme of the Quaternary in the eastern Wielkopolska Lowland was constructed basing on petrographic coefficients of tills, lithology, genesis and, finally, on hypsometric setting and thickness. In the light of these studies the maximum ice sheet unit of the Oldest Glaciation should be moved to the south from Kleczew. Moreover, tills of the Odranian, Wartanian and Vistulian Glaciations were found.
Źródło:
Geological Quarterly; 2000, 44, 2; 211-220
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stable isotopic and mineralogical investigations of an arid Quaternary lacustrine palaeoenvironment, Western Qaidam, China
Autorzy:
Bojar, A. V.
Rieser, A.
Neubauer, F.
Bojar, H. P.
Genser, J.
Liu, Y.
Ge, X. H.
Powiązania:
https://bibliotekanauki.pl/articles/2058952.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Qaidam
Quaternary
stable isotopes
celestine
carbonates
hypersaline lacustrine environment
Opis:
Stable isotope analyses on carbonates from lake evaporites collected from the non-marine western Qaidam basin yield a positive excursion from Pliocene to Quaternary times. At Dafeng Shan, the Quaternary sequences are composed of alternating layers of celestine/dolomite and aragonite/calcite/barite with distinct isotopic compositions. The sequence described at Dafeng Shan formed in a low energy, hypersaline lacustrine environment as indicated by the microstructures and evaporitic minerals as well as by the absence of lithoclasts. The peloids, ooids and oncoids described are related to microbialactivities in saline lake. The oxygen isotopic composition of the carbonates vary between +34.4 and +39.8‰ (SMOW), representing the heaviest values measured until now. The δ18 O and the δ34 S isotopic composition of the celestine range between 20.1 to 22.3‰ (SMOW) and +19 to +22‰ (CDT) respectively, suggesting sulfur recycling via sulfide oxidation. The carbon isotopic compositions of the carbonates show a large negative excursion of up to -30‰. The microstructures, mineralogy and isotopic compositions as well as the geological context suggest oxidation of methane from a deep source.
Źródło:
Geological Quarterly; 2005, 49, 2; 173-184
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Erosion and accumulation phases during the last glacial-interglacial cycle : a case study of the terrace system of the Odra and Osobłoga rivers (southern Poland)
Autorzy:
Wójcicki, Krzysztof Jan
Pawelec, Halina
Malik, Ireneusz
Woskowicz-Ślęzak, Beata
Moska, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2058537.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fluvial processes
river terraces
Late Quaternary
OSL
southern Poland
Opis:
In the Odra and Osobłoga River valleys in the vicinity of the town of Krapkowice, a system of morphological levels is present which is exceptionally extensive compared to other such systems in southern Poland. The extent, origins and chronology of these levels have been the subject of many controversies. In the light of current research, the terraces, which are situated on average 14.5-13, 12-10, 8-6, 6-4 and 3-1 metres above the river level, were formed in the post-Wartanian interval. The main factor driving their development was erosion, which compensated for the effects of large-scale aggradation that had occurred during the anaglacial phase of the Odranian Glaciation (MIS 8) dated to 261 ±15 ka. The impact of climatic conditions on the trends towards fluvial erosion or accumulation was only of secondary importance. According to OSL dating, successive phases of vertical stabilisation of the valley floor occurred ~118.8 ±8.3, 87.7 ±5.7 and 42.0 ±2.0 ka. In the meantime, erosion intensified, which resulted in the formation of lower terrace levels. During the climatic minimum of the Upper Plenivistulian (21.5 ±1.5 ka), under conditions of the delivery of sheet-wash-generated sediment, the aggradation of distal reaches of the Odra River valley was locally marked. During the Late Vistulian and Holocene, erosive tendencies continued, which were reflected by the fact that the surfaces of subsequent inset alluvial fills were situated ever lower. In the light of dating results, it can be concluded that during the colder periods correlated with the Rederstall Stadial (MIS 5b) and with the Hasselo Stadial (MIS 3), a braided river was present in the river valleys examined, which was most probably accompanied by permafrost. During the Eemian Interglacial (MIS 5e), during the Late Vistulian Interstadials and in the Holocene, it was a meandering river.
Źródło:
Geological Quarterly; 2020, 64, 1; 104--119
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphotectonic implication of the Paleoproterozoic Mid-Lithuanian Suture Zone
Autorzy:
Šliaupa, S.
Satkūnas, J.
Motuza, G.
Šliaupienė, R.
Powiązania:
https://bibliotekanauki.pl/articles/2060596.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
morphotectonic
Mid-Lithuanian suture zone
paleoproterozoic basement
quaternary
tectonic inheritance
Opis:
The Paleoproterozoic Mid-Lithuanian Suture Zone represents one of the major structures of the crystalline basement of Lithuania, separati ng the West Lithuanian and the East Lithuanian domains. This zone has shown persistently low tectonic activity during the Phanerozoic. The Mid-Lithuanian Suture Zone is marked by a distinct Middle Lithuanian topographic low underlain by a trough in the sub-Quaternary surface that suggests the morphotectonic nature of this depression. This is supported by high-precision geodetic level l ing data that has unravelled the subsidence trend of the Middle Lithuanian trough. The zone is also distinct in its pattern of topographic lineaments. The persistence of the tectonic activity of the Mid-Lithuanian Suture Zone suggests that it represents a large-scale mechanical boundary of the Earth's crust, resulting in increased accumulation of tectonic strain.
Źródło:
Geological Quarterly; 2017, 61, 3; 590--601
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Glaciotectonic deformation patterns in Estonia
Autorzy:
Rattas, M.
Kalm, V.
Powiązania:
https://bibliotekanauki.pl/articles/2058757.pdf
Data publikacji:
2004
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Estonia
Quaternary
glaciotectonic landforms and structures
soft sediment deformations
drumlins
Opis:
Field and archival data have been used in compiling the Glaciotectonic Map of Estonia. Two principal types of glaciotectonic deformations shown on this are discussed here: dislocations of rigid bedrock, and soft bed deformations associated with unconsolidated drift masses. Most bedrock disturbances occur in the narrow zone south of the Baltic Klint and in the tectonically crushed zone where the fractured bedrock was easy to break, displace and deform by the moving glacier. Some of the bedrock dislocations are related to ice-marginal deposits of the Late Weichselian Glaciation (Palivere and Pandivere Phases). Most subglacial deformations of soft sediments are simple in style, namely: shear and ductile deformations within a thin layer. The spatial organisation and efficiency of drainage beneath the local ice streams determined the deformational behaviour of sediments at the ice/bed interface. Ice-marginal deposits of the Late Weichselian deglaciation have not been subjected to large-scale compressive deformation. This suggests that most marginal deposits were formed as the result of brief standstills of the ice margin which caused sediment deformation either at the ice margin or beneath the ice sole.
Źródło:
Geological Quarterly; 2004, 48, 1; 15-22
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pliocene to Quaternary stress field change in the western part of the Cen tral West ern Carpathians (Slovakia)
Autorzy:
Vojtko, R.
Hók, J.
Kováč, M.
Sliva, L’.
Joniak, P.
Šujan, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060207.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Carpathians
fault-slip data
Quaternary stress field
neotectonics
palaeostress analysis
Opis:
Knowledge of the current tectonic regime plays an essential role in natural hazard assessment, especially in the risk assessment of fault activity. Structural analysis of brittle deformations (using in version techniques) was used to determine the stress field state occurring within Pliocene and Quaternary deposits in the western part of the Central Western Carpathians. The deformation pattern of the reduced stress tensor showed that all structural measurements could be separated into two groups. An older, Late Pliocene fault population was activated un der NNW-SSE oriented extension. A younger, Quaternary fault population reflected origin in a NE–SW extensional tectonic regime and it distinctly showed a change the orientation of the S3 of about 70. The change in tectonic activity, as well as in the stress field orientation, is dated to the Pliocene-Pleis to cene boundary. The Quaternary stress field developed dur ing the post-collisional stage of the orogen. Our study shows that the West ern Carpathian internal units document NE-SW to NNE-SSW extension in the broader region around of the north ern Danube Basin.
Źródło:
Geological Quarterly; 2008, 52, 1; 19-19
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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