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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

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    DB - Geology and mineralogy

  • OECD FORD branch

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

  • 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