International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

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Triassic crinoids from the Tatra Mountains and their stratigraphic significance (Poland)

Published: Apr 2006

Pages: 69 - 77

Authors: ROBERT NIEDZWIEDZKI, MARIUSZ A. SALAMON

Abstract: Stratigraphically important crinoid species Holocrinus acutangulus (Meyer) and Holocrinus dubius (Goldfuss) have been found for the first time in the Tatras, and the occurrence of Silesiacrinus silesiacus (Beyrich) was clarified. The following crinoid Zones: Dadocrinus, acutangulus, dubius and silesiacus, known from the Germanic Basin, are proposed for the Tatra Mountains. The Dadocrinus Zone is distinguished in the Tatricum and Fatricum complexes; both the acutangulus and dubius Zones are distinguished in the Tatricum complex, and the silesiacus Zone is distinguished in the Fatricum complex. The crinoid remains determined previously as Encrinus and Entrochus were found to have no stratigraphic value in the present state of research. The crinoids suggest a late Olenekian age for the limestones from Giewont, a latest Bithynian–early Pelsonian age for the limestones from Krzesanica and a middle Pelsonian age for the limestones of Ciemniak. The dolomites from the Filipka Valley quarry are dated as late Pelsonian–early Illyrian.

Keywords: Middle Triassic, Tatra Mountains, stratigraphy, taxonomy, crinoids

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