Record details

    Key Lower Palaeozoic faunas from near the Trans-European Suture Zone
Statement of responsibility
    L. Robin. M. Cocks
Other titles
    Palaeozoic Amalgamation of Central Europe (Variant.)
    Cocks, L. Robin M.
Source title - serial
    Geological society special publication
    Vol. 201
    p. 37-46
    2 obr., 1 fot., 2 s. bibl.
    Zkr. název ser.: Geol. Soc. spec. Publ. (London).
Subject group
    rotace desek
    tektonika bloková
    trace fossils
    zóna suturová
Geographical name
Abstract (in english)
   Following recognition of the Vendian to mid-Ordovician rotation of Baltica, with more than 55° of that rotation occurring in the Upper Cambrian and Lower Ordovician, the Tornquist Margin of Baltica must have faced northwards towards Laurentia and the Panthalassic Ocean, rather than, as now, southwestwards towards Gondwana (including Avalonia). Unequivocally Baltic endemic trilobite, brachiopod and other faunas are known from both the Cambrian and the Ordovician of the Holy Cross Mountains, Poland, and from both parts of them, i.e. the Malopolska Block and the Lysogóry Block. Whether or not these two blocks were united into a single terrane or were separate as two terranes is equivocal from the faunal evidence, and there is no faunal evidence of substantial strike-slip faulting of the blocks in relation to the main Baltic craton: they are perceived as having made up part of the margin of Baltica itself.
   However, both Holy Cross Mountain blocks were different and palaeogeographically separate from the Bruno-Silesian Block, whose continental origins are yet to be finally determined. The Ordovician clastic sediments at both Riigen, north Germany, and Pomerania, NW Poland, have yielded no macrofossils other than graptolites, but microfossils (acritarchs and chitinozoa) are interpreted as having been deposited at relatively high palaeolatitudes, i.e. at a higher palaeolatitude than Baltica, and may have been deposited in an ocean basin within the Tornquist Ocean between Baltica and Avalonia
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    25. 3. 2008
Import date
    8. 8. 2012