Podrobnosti záznamu

    Comparison of Cenomanian Floras from Western Interior North America and Central Europe
Údaj o odpovědnosti
    Jiří Kvaček, David L. Dilcher
Další názvy
    Eur-American Floristic Similarities through the Cenophytic, 8.5.1999, St.Louis (Variant.)
    Dilcher, David L.
    Kvaček, Jiří, 1937-
Zdrojový dokument - seriál
    Acta Universitatis Carolinae, Geologica
    Vol. 44, no. 1
    p. 17-38
    6 obr., 1 tab., 4 pl., 3 s.bibl.
    Zkr. název ser.: Acta Univ. Carol., Geol.
Předmětová skupina
    česká křídová pánev
    taxon endemický
Geografické jméno
    Polsko - jihozápad
Klíčové slovo
Abstrakt (anglicky)
   The Peruc-Korycany and Dakota Formations have the most diverse mid-Cretaceous floras plants and fossil plant assemblages. They display sufficient similarities to suggest that many of the elementss that they share represent closely related and widely distributed taxa. These taxa may have been common throughout most of the mid latitude Laurasian mid-Cretaceous land masses. Similar taxa for both floras show pteridophytes from families Gleicheniaccac and Schizeaceac, conifer Brachyphyllum and angiosperms from orders Laurales and Hamamclidales. Angiosperms although evolutionary the youngest, have the most similarities. In both continents they were the most expansive plant group being part of the invasive pioneer assemblages growing, for example, in highly disturbed environments of braided rivers. Competition between gymnosperms and angiosperms was more successful for angiosperms in North America during Cenomanian.
   Several essential conclusions are made: (1.) Plants of the mid-Cretaceous were sensitive to changes of oceans and landmass distribution. (2.) Comparing the two floras we must consider the geological history of each of the two areas and include interpretations of separate palaeoenvironments based on sedimentology and Mesozoic vegetational history as much as possible. (3.) Comparing the two floras we must evaluate them in relation to their environmental similarities or differences. If we compare two plant assemblages from similar environments, although each may be from geographically a great distance, they probably have more similar taxa than two fossil plant assemblages from different environments separated by the distance of only several kilometers
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    20. 8. 2007
Datum importu
    8. 8. 2012