Record details

Title
    Late Famennian Phytogeographic Provincialism: Evidence for a Limited Separation of Gondwana and Laurentia
Statement of responsibility
    Milada Vavrdová, Peter E. Isaacson
Other titles
    North Gondwana: Mid-Palaeozoic Terranes, Stratigraphy and Biota. (Variant.)
    Phytogeographischer Provinzialismus im späten Famennium: Nachweis einer beschränken Separation von Gondwana und Laurentia
Author
    Isaacson, Peter E.
    Vavrdová, Milada
Language
    anglicky
Source title - serial
    Abhandlungen der Geologischen Bundesanstalt
Vol./nr.
    Vol. 54
Pages
    p. 453-463
Year
    1999
Notes
    1 obr., 3 pl., 2 s.bibl.
    Německé resumé
    Zkr. název ser.: Abh. Geol. Bundesanst. (Wien)
Subject group
    Acritarcha
    devon
    famen
    Gondwana
    paleoklimatologie
    paleooceánografie
    palynologie
    plankton
    provincie floristická
    taxon endemický
Keyword
    Evidence
    Famennian
    Gondwana
    Late
    Laurentia
    Limited
    Phytogeographic
    Provincialism
    Separation
Abstract (in english)
   Acritarchs and prasinophyte cysts are palynomorphs considered to be marine microplakton, and they reveal a distinct provincialism. Recognition of provinces, based on selected temperature-sensitive morphotypes, may help define paleocontinent positions and paleolatitudes. Distribution of the Late Devonian acritarch, Umbellaspaeridium saharicum, has been used to distinguish a high-latitude microplakton community in Frasnian and Famennian time. Umbellasphaeridium saharicum is dominant in Peruvian and Bolivian Late Devonian palynospectra and present in numerous western Gondwana localities, as well as in the presumed southernmost parts of Laurussia. Further palynological data are needed to confirm the restricted occurrence of this morphologically distinctive morphotype, and its absence in the Late Devonian warm to tropical climatic belts
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    20. 2. 2008
Import date
    8. 8. 2012