Wszystkie pola: lithofacies - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The internal geometry and lithofacies pattern of the Upper Cretaceous-Danian sequence in the Polish Lowlands
Autorzy:: Leszczyński, K.
Powiązania:: https://bibliotekanauki.pl/articles/2058992.pdf
Data publikacji:: 2012
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Upper Cretaceous-Danian sequence
Polish Lowlands
structural and thickness maps
lithofacies pattern
Opis:: The paper presents a set of maps illustrating the internal geometry of the Upper Cretaceous-Danian sedimentary sequence in the Polish Lowlands. Qualitative lithofacies are used for reconstructions with the dominant lithofacies component and accessory components indicated. The following maps are produced: (1) base Upper Cretaceous structural map; (2) Upper Cretaceous (including Danian) thickness map; (3) thickness map of succession K3 (Cenomanian–lower Turonian, excluding the upper Albian cycle K3-I, which is the lowermost cycle of succession K3, but formally belongs to the Lower Cretaceous); (4) succession K4 (upper Turonian–Danian) thickness map. The maps of successions K3 and K4 illustrate the post-inversion geometry of the basin for the pre-inversion (Cenomanian–lower Turonian) and syn-inversion (upper Turonian–Danian) successions. Thickness analysis shows an increasing difference in subsidence rate during the Late Cretaceous between the areas extending on the two sides of the present-day Mid-Polish Swell. Much higher subsidence rates during deposition of succession K4 occurred in the area extending to the SW of the swell. The maximum subsidence zone migrated with time from the Pomeranian and Kujavian segments towards the Kujavian and Lublin segments. The lithofacies pattern is presented in seven maps constructed for individual eustatically and tectonically controlled cycles: K3-II–K3-III (early Cenomanian–early late Cenomanian), K3-IV (latest Cenomanian–early Turonian), K4-I (late Turonian–Coniacian), K4-II (Santonian–earliest Campanian), K4-III (late early Campanian–earliest Maastrichtian), K4-IV–K4-V (late early Maastrichtian–late Maastrichtian) and Pc-I (Danian–?earliest Selandian).
Źródło:: Geological Quarterly; 2012, 56, 2; 363-386
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Silurian of southwestern margin of the East European Platform (Ukraine, Moldova and Romania) : lithofacies and palaeoenvironments
Autorzy:: Radkovets, N.
Powiązania:: https://bibliotekanauki.pl/articles/2059822.pdf
Data publikacji:: 2015
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: East European Platform
Silurian
lithofacies
reef
shelf of Baltica
palaeoenvironments
Opis:: Silurian strata, stretching along the western margin of the East European Platform from the Baltic to the Black Sea, represent a potential target for both conventional and unconventional hydrocarbon exploration. Distribution of the black shale facies, prospective for shale gas, and the reef facies, prospective for oil, has been studied in respect of palaeoenvironments. The Silurian sequence has been investigated in the territory of Ukraine (Volyn-Podillyan Plate, Dobrogean Foredeep) and correlated with the data on Moldova and Romania (Moldovian Platform). The occurrence of Silurian strata, their thickness, and petrographic and lithological characteristics allowed reconstructing the distribution of open-shelf, reef and lagoonal facies. The reef facies migrated during the Wenlock–Middle Pridoli, shifting towards the open sea and back towards the shore, and therefore has been termed a migrating reef facies. Correspondingly, the boundary between the open-shelf and reef facies was shifting. The facies distribution was controlled by the transgressive-regressive cycles, which caused the fluctuations of the shelf water depth in different time intervals of the Silurian. The shelf water depth of about 100 m, where the top of the oxygen-minimum layer impinged on the sea bottom, was the boundary between the open-shelf facies, represented by organic-rich sediments, and the reef buildups.
Źródło:: Geological Quarterly; 2015, 59, 1; 105--118
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Rozwój litofacjalny późnej kredy Niżu Polskiego
Lithofacies evolution of the Late Cretaceous Basin in the Polish Lowlands
Autorzy:: Leszczyński, K.
Powiązania:: https://bibliotekanauki.pl/articles/2062985.pdf
Data publikacji:: 2010
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: litofacje
paleotektonika
kreda górna
Niż Polski
lithofacies
palaeotectonic setting
Upper Cretaceous
Polish Lowlands
Opis:: Praca jest podsumowaniem wieloletnich badań autora prowadzonych nad stratygrafią, litologią i paleogeografią kredy górnej Niżu Polskiego. W wyniku syntezy danych z 1018 otworów wiertniczych skonstruowano 6 map litofacjalno-paleogeograficznych, odpowiadających wydzielonym dla basenu późnej kredy na obszarze Niżu Polskiego cyklom transgresywno-regresywnym: K3-II–K3-III (wczesny cenoman–starszy późny cenoman), K3-IV (najmłodszy cenoman–środkowy turon), K4-I (późny turon–koniak), K4-II (santon–najstarszy kampan), K4-III (młodszy wczesny kampan–najstarszy mastrycht) i K4-IV–K4-V (młodszy wczesny mastrycht–późny mastrycht). Na mapach zastosowano jakościowe rekonstrukcje litofacjalne, ze wskazaniem na dominujący składnik litologiczny oraz składniki litologiczne towarzyszące. Wydzielono dziewięć kategorii litofacjalnych, odpowiadających określonym środowiskom i systemom depozycyjnym. Są to litofacje: kredy piszącej, węglanowa (wapienna), węglanowo-krzemionkowa, marglista, ilasto-marglista, mułowcowo-marglista, mułowcowo-piaszczysto-marglista, węglanowo piaszczysta i piaszczysta. W ramach prac nad prezentowaną w artykule wersją map, autor dokonał też kompleksowej analizy materiałów z wierceń Niżu Polskiego, uwzględniając przede wszystkim profilowania geofizyki wiertniczej. Niektóre profile wierceń zostały zweryfikowane i ponownie zinterpretowane. W szczególności, akcent położono na analizę poziomów twardych den, przerw sedymentacyjnych i wszelkich przejawów cykliczności sedymentacji. Umożliwiło to, w kilku przypadkach, logiczne korelacje odpowiadających sobie kompleksów litologicznych, które wcześniej stwarzały problemy interpretacyjne i były niewłaściwie skorelowane. Scharakteryzowano ogólne następstwo litofacji w basenie, zaprezentowano uwagi o subsydencji i batymetrii basenu oraz przedyskutowano pokrótce problem inwersji tektonicznej bruzdy śródpolskiej. Przedstawiona także została historia rozwoju litofacjalnego basenu późnej kredy.
The report is a general overview of the author’s many-year studies on the Late Cretaceous stratigraphy, lithology and paleogeography of the Polish Lowlands. Six lithofacies maps are presented for individual transgressive-regressive cycles in the Late Cretaceous of the Polish Basin: K3-II–K3-III (Early–early Late Cenomanian), K3-IV (latest Cenomanian–Middle Turonian), K4-I (Late Turonian–Coniacian), K4-II (Santonian–earliest Campanian), K4-III (late Early Campanian–earliest Maastrichtian), K4-IV–K4-V (late Early–Late Maastrichtian). The maps were constructed using qualitative lithofacies reconstructions with the dominant lithofacies component and accessory components indicated. Nine lithofacies types, corresponding to specific sedimentary environments and depositional systems, have been identified within the Upper Cretaceous succession of the Polish Lowlands: chalk, carbonate, carbonate-siliceous, marl, claystone-marl, mudstone (siltstone)-marl, mudstone-sandstone-marl, sandy-carbonate and sandstone lithofacies. The present version of the maps is based on an integrated analysis of drilling materials, mainly wireline logs. Lithology and stratigraphy in some boreholes were verified and reinterpreted by the author. In particular, special emphasis was laid on analysing hardgrounds, sedimentary breaks and any signs of sedimentary cyclicity. It enabled logical correlations between corresponding lithological complexes, which were previously incorrectly correlated. General succession of lithofacies in the basin is characterised, remarks on its subsidence and bathymetry are presented and a brief discussion of the problem of Late Cretaceous tectonic inversion of the Mid-Polish Trough is given. The report also presents the history of lithofacies evolution in the Late Cretaceous basin.
Źródło:: Biuletyn Państwowego Instytutu Geologicznego; 2010, 443; 33--53
0867-6143
Pojawia się w:: Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Lithofacies and palaeoenvironmental interpretation of the Early Jurassic Höör Sandstone, Southern Sweden
Autorzy:: Pieńkowski, G.
Powiązania:: https://bibliotekanauki.pl/articles/2059898.pdf
Data publikacji:: 2002
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Höör Sandstone (Fm)
Early Liassic
Stanstorp Member
Vittseröd Member
sedimentology
fluvial lithofacies
storm- and tide-dominated facies
formal lithostratigraphy
Opis:: Sedimentological analysis of the Early Jurassic Höör Sandstone in Central Scania, Sweden shows that two units representing different lithofacies may be distinguished. The lower Stanstorp Member is characterised by texturally and mineralogically heterogeneous sediments. Mature arenites and immature quartz and subarkosic wackes form two clearly separated groups, interpreted as fluvial channel and alluvial plain deposits respectively. The fluvial character of this member is supported by a dominance of unidirectionally oriented trough sets, abundant plant detritus, the presence of plant roots and palaeosols and a lack of marine body fossils and trace fossils. An intercalated composite polymict conglomerate layer is interpreted as the result of an extraordinary flood. The overlying Vittseröd Member is characterised by mature quartz arenites and large-scale tabular sets with multidirectional orientations. The Vittseröd Member arenites are of storm- and possibly tide-dominated shoreface origin. Bidirectional wave and tide-induced longshore currents and unidirectional onshore migration of sand ridges were the chief depositional processes. Longshore currents towards the NNW prevailed. Upper flow regime features, and erosion and reworking of sediments are attributed to the storm-induced rip currents. Lithofacies characteristics are used to define the following lithostratigraphical units: the Stanstorp and the Vittseröd members, as well as the Höör Sandstone (Fm) above. Lithofacies and palaeoenvironmental characteristics of the Vittseröd Member and their comparison with the facies of the Helsingborg and Döshult members in Western Scania suggest a Sinemurian age for the Vittseröd Member.
Źródło:: Geological Quarterly; 2002, 46, 3; 307-320
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Lithofacies and depositional environments of the Paleogene/Neogene sediments in the Hoanh Bo Basin (Quang Ninh province, NE Vietnam)
Autorzy:: Hoang, V. T.
Wysocka, A.
Phan, D. P.
Nguyen, Q. C.
Ziółkowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/184794.pdf
Data publikacji:: 2015
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: terrestrial environments
lithofacies
Paleogene
Neogene
Vietnam
Opis:: The Hoanh Bo Basin is a multiple period formed basin which is associated with the tectonic mechanism due to the activity of the Chi Linh-Hon Gai and Trung Luong Faults during the late Paleogene – early Neogene time. The basin is filled with continental sediments, comprising mainly polymictic conglomerates, sandstones, siltstones, claystones and shales. Coarser-grained polymictic deposits predominate along the northern and western margins of the basin, while different types of siltstones, claystones, even sandstones occur in its center, as well as along its southern and eastern parts toward the Ha Long Bay. The source rocks for sedimentary materials are mainly originated from rocks of the Hon Gai and Ha Coi Formations. Based on the dominant grain-size class, texture, stratification, degree of clast rounding and sorting, 17 lithofacies were determined in the Hoanh Bo Basin infill. The basin is filled by gravelly, sandy and fine-grained lithofacies just covers a modest area but it represents a full of succession of 4 depositional systems including alluvial fan, fluvial, deltaic and lacustrine environments. Alluvial fan and fluvial environments are characterized by an assemblage of lithofacies such as sand- and mud-supported disorganized breccias (Gb), clast- to sand-supported conglomerates (Gmm), clast-supported inverse-graded conglomerates (Gig), planar-cross-bedded conglomerates (Gp), trough cross-bedded conglomerates (Gt), horizontally stratified conglomerates (Gh), planar cross-bedded sandstones (Sp), trough cross-bedded sandstones (St), ripple cross-laminated sandstones (Sr), horizontally bedded sandstones (Sh), massive sandstones (Sm), massive mudstones, siltstones (Fsm), laminated siltstones and mudstones (Fl), massive claystones (Fm) and coaly lithofacies (C); the deltaic assemblage is dominated by planar-cross-bedded conglomerates (Gp), horizontally stratified conglomerates (Gh), planar cross-bedded sandstones (Sp), horizontally bedded sandstones (Sh), low-angle cross-bedded sandstones (Sl); while the lacustrine assemblage consists of ripple cross-laminated sandstones (Sr), horizontally bedded sandstones (Sh), normally graded sandstones (Sng), massive mudstones, siltstones (Fsm), laminated siltstones and mudstones (Fl), massive claystones (Fm) and coaly lithofacies (C).
Źródło:: Geology, Geophysics and Environment; 2015, 41, 4; 353-369
2299-8004
2353-0790
Pojawia się w:: Geology, Geophysics and Environment
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Analysis of lithofacies cyclicity in the Miocene Coal Complex of the Bełchatów lignite deposit, south-central Poland
Autorzy:: Mastej, W.
Bartuś, T.
Rydlewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/94646.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: Markov chain
method
cyclic sedimentation
vertical succession of lithofacies
łańcuchy Markowa
metoda
cykliczna sedymentacja
litofacja
Opis:: Markov chain analysis was applied to studies of cyclic sedimentation in the Coal Complex of the Bełchatów mining field (part of the Bełchatów lignite deposit). The majority of ambiguous results of statistical testing that were caused by weak, statistically undetectable advantage of either cyclicity over environmental barriers or vice versa, could be explained if only the above-mentioned advantages appeared in the neighbourhood. Therefore, in order to enhance the credibility of statistical tests, a new approach is proposed here in that matrices of observed transition numbers from different boreholes should be added to increase statistical reliability if they originated in a homogeneous area. A second new approach, which consists of revealing statistically undetectable cyclicity of lithofacies alternations, is proposed as well. All data were derived from the mining data base in which differentiation between lithology and sedimentary environments was rather weak. For this reason, the methodological proposals are much more important than details of the sedimentation model in the present paper. Nevertheless, they did reveal some interesting phenomena which may prove important in the reconstruction of peat/lignite environmental conditions. First of all, the presence of cyclicity in the sedimentation model, i.e., cyclic alternation of channel and overbank deposits, represents a fluvial environment. It was also confirmed that the lacustrine subenvironment was cut off from a supply of clastic material by various types of mire barriers. Additionally, our analysis revealed new facts: (i) these barriers also existed between lakes in which either carbonate or clay sedimentation predominated; (ii) there was no barrier between rivers and lakes in which clay sedimentation predominated; (iii) barriers were less efficient in alluvial fan areas but were perfectly tight in regions of phytogenic or carbonate sedimentation; (iv) groundwater, rather than surface flow, was the main source of CaCO3 in lakes in which carbonate sedimentation predominated; (v) a lack of cyclic alternation between abandoned channels and pools with clayey sedimentation; (vi) strong evidence for autocyclic alternation of phytogenic subenvironments and lakes in which carbonate sedimentation predominated was found in almost all areas studied.
Źródło:: Geologos; 2015, 21, 4; 285-302
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: An application of Markov chain analysis to studies on lithofacies sequences in the alluvial fans from the "Bełchatów" lignite deposit (Poland
Zastosowanie analizy łańcuchów Markowa do badań sekwencji litofacji w stożkach napływowych w złożu węgla brunatnego "Bełchatów"
Autorzy:: Mastej, W.
Powiązania:: https://bibliotekanauki.pl/articles/191575.pdf
Data publikacji:: 2002
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: Markov chain analysis
vertical lithofacies succession
Bełchatów lignite deposit
alluvial fans
lacustrine limestones
Opis:: The Markov chain analysis was used to study on lithofacies sequences in alluvial fans enclosed in the main seam of the "Bełchatów" lignite deposit. Quantitative approach supported the qualitative results of sedimentological analysis - the origin of muds, clays and coaly clays as well as the presence of a barrier (peat bog) between the fans and the lake with carbonate deposition. It was found that ephemeral lakes located on the fan surface were favourable sites for development of peat bogs. Similarly, the same lakes evolving into the peat bogs were favourable environments for expansion of sand lobes of the fans. It was discovered that cyclicity in sediment succession was disturbed by erosion. The new model of lacustrine limestone deposition was proposed for the northwestern part of lake which borders the fans from the northwest.
Źródło:: Annales Societatis Geologorum Poloniae; 2002, 72, No 3; 271-282
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Litofacje formacji perspektywicznych dla gazu i ropy w łupkach w utworach ordowiku i syluru na obszarze bałtyckim i podlasko-lubelskim
Lithofacies of the Ordovician and Silurian formations prospective for shale gas/oilin the Baltic and Podlasie-Lublin areas
Autorzy:: Feldman-Olszewska, A.
Roszkowska-Remin, J.
Powiązania:: https://bibliotekanauki.pl/articles/2075505.pdf
Data publikacji:: 2016
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: litofacje
ordowik
silurian
łupki
lithofacies
Ordovician
Silurian
shales
Opis:: The paper presents a sedimentological analysis of Ordovician (Sandbian–Hirnantian = Caradoc–Ashgill) and Silurian (Landovery–Wenlock, lower Ludlow) claystones and mudstones from the north-eastern (Baltic Basin) and south-eastern (Podlasie-Lublin Basin) parts of the East European Craton. In both basins, formations prospective for shale gas/oil were analyzed: the Sasino Fm., Pasłęk Fm. (including the Jantar Mb.), Pelplin Fm., Udal Fm., Wrotnów Fm. and Terespol Fm. Based on lithological and sedimentological criteria, 34 lithofacies and 11 lithofacies associations have been distinguished. The most promising lithofacies arerepresentedbytheL-1,L-3andL-4associationswhicharecharacterizedbydarkgreycolour, a very low degree or lack of bioturbation, rare sedimentary structures, and common content of small pyrite concretions. They dominate in the Sasino Fm., Pas³êk Fm. (in the Jantar Mb. only) and Pelplin Fm., but are much less common in the Udal Fm., Terespol Fm. and Pas³êk Fm. (excluding the Jantar Mb.).
Źródło:: Przegląd Geologiczny; 2016, 64, 12; 968--975
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Lithofacies analysis of CMP at northern prospect of the Petrikov potash deposit (Belarus)
Analiza litofacjalna warstw ilasto-marglistych północnej części złoża soli potasowych Petrikow (Białoruś)
Autorzy:: Barbikau, D.
Klabuk, A.
Kurlovich, D.
Kutyrlo, V.
Sauchyk, S.
Powiązania:: https://bibliotekanauki.pl/articles/2192094.pdf
Data publikacji:: 2017
Wydawca:: Polskie Stowarzyszenie Górnictwa Solnego
Tematy:: lithofacies analysis
Petrikov potash deposit
waterproof thickness
lithostratigraphy
ArcGIS
analiza litofacjalna
Pietrykowskie złoże soli potasowej
warstwa nieprzepuszczalna
Opis:: The results of lithofacies analysis of clay-marl package (CMP) at Northern Prospect of Petrikov potash deposit are discussed. The analysis has been undertaken to increment waterproof thickness. Lithofacies subdivision has been carried out with ArcGIS 10 software. The following three lithofacies have been defined: sulfate-carbonate-clay, sulfate-clay-carbonate, and clastic-carbonate-clay. An inclusion of gypsum-bearing sub-package of the CMP into the waterproof thickness, based on the lateral lithofacies variation of rocks, will allow pillar mining at the areas, where the mining is prohibited at present by local regulatory documents.
W pracy omówiono wyniki analizy litofacjalnej warstwy ilastomarglistej (WIM) północnej części Pietrykowskiego złoża soli potasowej na Białorusi przeprowadzonej w celu rozpoznania warstw nieprzepuszczalnych. Rejonizację litofacjalną wykonano za pomocą programu ArcGIS 10. Wyróżniono trzy litofacje: siarczanowo-węglanowo-ilastą, siarczanowo-ilasto- -węglanową oraz klastyczno-węglanowo-ilastą. Włączenie do warstwy nieprzepuszczalnej subwarstwy gipsowej WIM, które oparto na lateralnej zmienności litolofacjalnej skał, w przyszłości pozwoli na eksploatację złoża systemem filarowym. Obecnie eksploatacja złoża jest zabroniona.
Źródło:: Przegląd Solny; 2017, 13; 150--155
2300-9349
Pojawia się w:: Przegląd Solny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Textural characteristics, mode of transportation and depositional environment of the Stormberg Group in the Eastern Cape, South Africa: evidence from grain size and lithofacies analyses
Autorzy:: Chima, Priscilla
Baiyegunhi, Christopher
Powiązania:: https://bibliotekanauki.pl/articles/2204351.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: grain size distribution
textural parameters
lithofacies classification
hydrodynamic energy conditions
Triassic
Jurassic
rozkład wielkości ziarna
parametry teksturalne
klasyfikacja litofacji
warunki hydrodynamiczne
warunki energetyczne
trias
jura
Opis:: The Stormberg Group comprises the Molteno, Elliot and Clarens formations and is one of four stratigraphical groups that make up the Karoo Supergroup in South Africa. The group is the highest unit in the Karoo Basin, representing the final phase of preserved sedimentation. The major problem with the Stromberg Group is that the mode of transport, hydrodynamic energy conditions and depositional environment are still poorly understood. For the present paper, grain size and lithofacies studies on selected sandstones from the Molteno, Elliot and Clarens formations were performed so as to elucidate their textural characteristics, depositional processes, sedimentation mechanisms and hydrodynamic energy conditions and to discriminate different depositional environments. The statistical parameters of grain size distribution (mean grain size, standard deviation, skewness and kurtosis) show that the sandstones are predominantly unimodal, fine grained, moderately well sorted, mesokurtic and near symmetrical. The bivariate diagrams of the aforementioned statistical parameters demonstrate that river and aeolian dune had the greatest impact on the depositional environments. Likewise, the C-M pattern (Passega diagram) shows that the sandstones were mostly deposited through tractive current process. Furthermore, the C-M diagram reveals the prevalence of rolling, suspension and graded suspension modes of sediment transportation. Seventeen sedimentary lithofacies were identified and grouped into seven lithofacies associations. These lithofacies associations indicate braided channel, overbank and swamp deposits for the Molteno Formation, alluvial fan/floodplain and playa deposits for the Elliot Formation and aeolian deposits for the Clarens Formation.
Źródło:: Geologos; 2022, 28, 1; 61--78
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Pleistocene deposits in the Southern Egyptian Sahara: lithostratigraphic relationships of sedimentsand landscape dynamics at Bir Tarfawi
Autorzy:: Hill, Christopher L.
Schild, Romuald
Powiązania:: https://bibliotekanauki.pl/articles/2026009.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: sediments
lithofacies
stratigraphy
groundwater
Pleistocene
Opis:: The sedimentological and lithostratigraphic record from north-central Bir Tarfawi documents the presence of Pleistocene basin-fill deposits. Three topographic basins were created as a result of deflation during climate episodes associated with lowering of the local groundwater table. In each case, the three deflational basins or topographic depressions were subsequently filled with sediments; these basin aggradations coincided with changes from arid climate conditions to wetter conditions and a rise in the groundwater table. The oldest and highest sedimentary remnant is associated with Acheulian artifacts and may reflect spring-fed pond and marsh conditions during a Middle Pleistocene wet climate episode. Lithofacies for a lower stratigraphic sequence (the “White Lake”) documents deposition in a perennial lake that varied in extent and depth and is associated with Middle Paleolithic artifacts. A third episode of deflation created a topographic low that has been filled with Late Pleistocene sediments that are associated with Middle Paleolithic artifacts and fossil remains. Lateral and vertical variations in the lithofacies of this basin-fill sequence and the sediments of the “grey-green” lake phases provide a record of changing hydrologic conditions. These hydrologic conditions appear to reflect variations in water-table levels related to groundwater recharge and, at times, local rains.
Źródło:: Studia Quaternaria; 2017, 34; 23-38
1641-5558
2300-0384
Pojawia się w:: Studia Quaternaria
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The Silurian of the Nida, Holy Cross Mts. and Radom areas, Poland - a review
Autorzy:: Modliński, Z.
Szymański, B.
Powiązania:: https://bibliotekanauki.pl/articles/2059315.pdf
Data publikacji:: 2001
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Holy Cross Mountains
Silurian
lithology
biostratigraphy
lithostratigraphy
lithofacies
Źródło:: Geological Quarterly; 2001, 45, 4; 435-454
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Controls on basal Zechstein (Wuchiapingian) evaporite deposition in SW Poland
Autorzy:: Dyjaczyński, K.
Peryt, T. M.
Powiązania:: https://bibliotekanauki.pl/articles/2060060.pdf
Data publikacji:: 2014
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Zechstein Basin
evaporites
3D seismics
lithofacies
sedimentation
anhydritization
SW Poland
Opis:: The development of basal Zechstein (Wuchiapingian) strata inSW Polandindicates the existence of a diversified relief inherited after the flooding of the pre-existing depression by the transgressing Zechstein sea. The deeper parts of the basin were the place of development of thin basinal Zechstein Limestone showing sedimentary condensation manifested by bored and encrusted grains and thick evaporites (mostly halite), and in shallow parts Zechstein Limestone reefs followed by thinner evaporite sequences (dominated by anhydrite) occur. The analysis of 3D seismic sections showed that instead of three conventionally recognized evaporite units of stratigraphic potential in the PZ1 cycle, five units occur (from the base to the top: Lower Anhydrite, Lower Oldest Halite, Middle Anhydrite, Upper Oldest Halite, Upper Anhydrite). In a particular place their number may vary from two (Lower Anhydrite at the base of the PZ1 cycle and Upper Anhydrite at the top of the PZ1 cycle) to five. There are two complexes of Lower Anhydrite occurring throughout the platform and basinal zones showing deepening-upward (transgressive) trend. The halite sedimentation in the deepest parts of salt basins began shortly after the deposition of the upper Lower Anhydrite complex while in the sulphate platform areas the sulphate deposition lasted still for a long time. The Lower Oldest Halite deposits occur in the depressions. Between the halite basins, anhydrite platforms occur, and the thickness of anhydrite platform deposits is smaller than it is observed in salt basins. The Upper Oldest Halite in turn is recorded above the anhydrite platform. The two halite units represent different phases of development of halite basins. The Lower Oldest Halite basins are related to the pre-Zechstein depressions, although in some cases their syndepositional subsidence was controlled by reactivation, during the deposition of basal Zechstein strata, of former faults. In turn, the Upper Oldest Halite basins used the accommodation space created due to anhydritization of the Lower Anhydrite deposits composed originally of selenitic gypsum. The 3D seismics evidences that the PZ1 evaporites inSW Polandhave been deposited in far more complex and dynamic system than it was assumed before.
Źródło:: Geological Quarterly; 2014, 58, 3; 485--502
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Integrated sedimentological and ichnological study of the Coniacian sedimentation in North Sudetic Basin, SW Poland
Autorzy:: Leszczyński, S.
Powiązania:: https://bibliotekanauki.pl/articles/2060087.pdf
Data publikacji:: 2018
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: lithofacies
ichnofacies
trace fossils
shallow marine
paralic
North Sudetic Synclinorium
Opis:: Lithofacies and ichnological features of the Coniacian deposits of the upper part of Żerkowice Member and lowest part of the overlying Czerna Formation in southeastern part of the North Sudetic Synclinorium are described and their sedimentary palaeoenvironment is interpreted. The study confirms a shallow-marine to paralic/paludine palaeoenvironment. Sedimentation of the Żerkowice Member occurred in an upper shoreface environment dominated by waves, tidal currents and wave-generated alongshore currents, with an episodic encroachment of fore shore zone and shoal-water deltas. The interpretation is supported by a high-diversity assemblage of trace fossils with 21 ichnogenera, representing a stressed expression of the Skolithos Ichnofacies dominated by Ophiomorpha nodosa and a proximal expression of the Cruziana Ichnofacies with Thalassinoides and rare specimens of diverse other ichnotaxa. Sedimentation of the Czerna Formation commenced after a stasis, with at least a local hiatus caused by emergence, and proceeded in a laterally and vertically more varied environment, with transgressive coastal lagoons evolving into freshwater lakes and marshes and with a repetitive regressive intrusion of shoreface and shoal-water deltas. The emergence of the area is recorded by coal-bearing deposits with plant-root traces. Local occurrence of the Teredolites Ichnofacies in coal (peat) deposits above the base of the Czerna Formation indicates renewed marine flooding. Continuation of the latter is locally evidenced by a trace-fossil assemblage with 17 ichnogenera, representing proximal expression of the Cruziana Ichnofacies followed by distal expression of the Skolithos Ichnofacies in the overlying transgressive-regressive cyclothems. The palaeoenvironmental changes recorded by the sedimentary succession indicate bathymetric fluctuations and imply considerable shoreline shifts and palaeogeographic changes in the basin. These changes are interpreted as a combined signal of 2nd- and 3rd-order eustatic cycles, modified and partly obliterated by the effects of intrabasinal tectonic forcing and by palaeogeographically controlled variation in sediment supply.
Źródło:: Geological Quarterly; 2018, 62, 4; 767--816
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Facies architecture of the Cambrian deposits of the Baltica shelf in the Lublin Basin, SE Poland
Autorzy:: Stadnik, Renata
Bębenek, Sławomir
Waśkowska, Anna
Powiązania:: https://bibliotekanauki.pl/articles/191224.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: Lower Palaeozoic
Baltica
shelf
sedimentary environments
lithofacies
Opis:: In the Cambrian, the Lublin Basin was a shallow-water area, located on the western edge of the Baltica palaeocontinent. The Cambrian sedimentary sequence, forming the lower part of the sedimentary cover of the North European Platform, is lithologically diversified and reflects dynamic variation in depositional environment. This paper presents the distribution of palaeofacies and sedimentary environments in the early Lublin Basin, including changes in their lateral extent during its evolution in the Cambrian. In order to evaluate the facies architecture of the Lublin Basin, a sedimentological analysis was carried out. On the basis of the detailed logging of drill cores, lithofacies made up of conglomerates, sandstones, mudstones and heterolithic deposits were distinguished; 16 lower-rank sublithofacies were identified. Their specific assemblages are indicative of shelf-type lithofacies associations, i.e. (1) tidal flat with muddy, mixed and sandy tidal plain sublithofacies including subtidal channels; (2) barrier-lagoon; (3) shoreface with lower, middle and upper shoreface subassociations; and (4) offshore with upper and lower offshore subassociations, including sandy tidal ridges. During the early Cambrian, the lateral variability and environmental succession indicate a transgressive, long-term trend and the migration of a lagoonal environment across wide tidal plains and the shoreface up to an offshore environment. The Lublin Basin reached its greatest lateral extent and maximum depth in the upper lower Cambrian. Next, an opposite trend began and during the middle Cambrian a regression cycle is recorded in successive changes in sedimentary environments that reflect a progressive shallowing. Multiple changes in adjacent environments indicate repeated and cyclical, lower-rank ingressions.
Źródło:: Annales Societatis Geologorum Poloniae; 2019, 89, 2; 105-120
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

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