Record details

Title
    Lacustrine couplet-lamination: evidence for Late Pennsylvanian seasonality in central equatorial Pangaea (Stephanian B, Slaný Formation, central and western Bohemian basins)
Author
    Laurin, Jiří
    Lojka, Richard
    Matys Grygar, Tomáš
    Matysová, Petra
    Sýkorová, Ivana
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Bulletin of Geosciences
Vol./nr.
    Roč. 85, č. 4
Pages
    26
Year
    2010
Thesaurus term
    seasonality, cyclicity, dispersed organic matter, freshwater lake, palaeoclimate
Keyword
    Basins
    Bohemian
    Central
    Couplet-lamination
    Equatorial
    Evidence
    Formation
    Lacustrine
    Late
    Pangaea
    Pennsylvanian
    Seasonality
    Slaný
    Stephanian
    Western
Abstract (in english)
   Lacustrine mudstones of the Mšec Member were acquired from two shallow boreholes 80 km apart and were analysed for mineral composition and dispersed organic matter, lamination structure, and lamination periodicity to gather more detailed information on the palaeoenvironmental change with a near annual resolution. The structure and development of the lamination is discussed in the context of previous detailed geochemical analysis of the lacustrine mudstones. The organic-detritic couplet lamination is composed of alternating dark (rich in algal remnants and clay) and light (rich in siliciclastics, carbonates, and terrestrial floral remnants) laminae suggesting their formation in response to seasonal changes in rainfall similarly as in some modern tropical lakes. Couplet thickness distribution shows statistically significant periodicities resembling multiannual to multidecadal scales observed in recent sediment archives.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014