Architecture, paleosols and cyclicity of the Middle-Late Pennsylvanian proximal fluvial system (Nýřany Member, Pilsen Basin, Czech Republic)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F16%3A00000043" target="_blank" >RIV/00025798:_____/16:00000043 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/16:10328918
Result on the web
<a href="http://dx.doi.org/10.3140/bull.geosci.1509" target="_blank" >http://dx.doi.org/10.3140/bull.geosci.1509</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3140/bull.geosci.1509" target="_blank" >10.3140/bull.geosci.1509</a>
Alternative languages
Result language
angličtina
Original language name
Architecture, paleosols and cyclicity of the Middle-Late Pennsylvanian proximal fluvial system (Nýřany Member, Pilsen Basin, Czech Republic)
Original language description
The Nýřany Member in the Pilsen Basin records the evolution of a broad paleotropical alluvial plain that preserves amalgamated lenticular to sheet sandstone bodies separated by basin-wide floodplains. Facies and architectural element analysis in conjunction with well log correlation was employed in order to reconstruct fluvial system stacking patterns and decipher the controls responsible for the preserved fluvial architectures and identify the possible influence of allogenic processes on basin fill architectures. The main architectural components identified include: 1) sheet-like and lenticular pebbly to cobbly conglomerate thalweg-fill representing the lowermost portion of channels that are preferentially preserved; 2) inclined gravel-sand and sandy strata of barforms and rarely preserved 3) mudstone units representing floodplains and abandoned channel-fills. These architectural elements combine to form a hierarchy of alluvial cycles represented by channel-bar systems (3–10 m thick), channel-belts (4–15 m thick) and stacked channel-belt complexes (10–35 m thick). Autogenic processes of lateral migration and local and regional avulsion of braided channels of intermediate sinuosity (1.5) controlled the formation of the smaller scale cycles. While the geometry of stacked channel belt complexes (sandbodies) appear to be driven by variations in subsidence rates, their cyclic alternation with extensive floodplains is considered to be related to allogenic processes of variable seasonality of precipitation which affected sedimentation rates and water-table level in the basin. Their maximum periodicity of 140 k.y. indicate that eccentricity paced changes of Earth's orbit may be a driving force controlling climate stability in the Pennsylvanian paleotropics.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP210%2F11%2F1431" target="_blank" >GAP210/11/1431: Climatic archives recorded in the Late Paleozoic basins of the Bohemian Massif: proxies for reconstruction of climatic changes</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Bulletin of Geosciences
ISSN
1214-1119
e-ISSN
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Volume of the periodical
91
Issue of the periodical within the volume
1
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
30
Pages from-to
111-140
UT code for WoS article
000372546600009
EID of the result in the Scopus database
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