Podrobnosti záznamu

    State of art in reconstruction of early Variscan block-and-basin configurations (Emsian-Eifelian, Devonian)
Údaj o odpovědnosti
    Jindřich Hladil
    Hladil, Jindřich, 1953-
Zdrojový dokument - seriál
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
    Vol. 71, no. 1
    p. 31-35
    7 obr., 22 bibl.
    České resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Předmětová skupina
    kontinentální drift
    vrásnění variské
Předmětová kategorie
Geografické jméno
Klíčové slovo
Abstrakt (anglicky)
   According to the majority of recent data, theposition of crustal blocks of Emsian-Eifelian (E-E) age are not in contradiction with the general Paleozoic scenario of plate tectonics. FDuring the E-E times, the northern Gondwana drifted across 30°-south paleolatitude. While the Gondwana motion was directed northwesterly, Laurussia retreated moderately towards the north with its southern margins in the vicinity of the equator. The main feature of the Variscan crust dynamics is the series of elongated microcontinents and island-arcs that migrated northwesterly from Gondwanan to Laurussian margins. Recrudescent basin formation and collisions characterize these processes. Ruptures several thousands kilometers in length developed within and/or along acreted Avalonia (southern margin of Laurussia). This strike slip fault was subsequently transformed to a series of expansion basins.
   The Rheic and Prototethys oceans persisted in much reduce shape south of this just opened scar.Basins related to mature cratonic deltas or opening rifts are very significant for the whole of E-E times, especially west and east from central European terranes. Although the last mentioned types of basins are well-represented their significance is not sufficient to corroborate an eventual simple overall-extension model. Of course, the blank space on the E-E globe around the reconstructed areas represents the main puzzle of the whole E-E configuration. This blank space, or phantom giant Paleopacific ocean, lacks any direct evidence for paleodistances and so it provides enough space for any recent hypotheses about the global paleogeographic configuration of the Emsian-Eifelian times
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    28. 3. 2008
Datum importu
    8. 8. 2012