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

KONRADSHEIM LIMESTONE OF THE GRESTEN KLIPPEN ZONE (AUSTRIA): NEW INSIGHT INTO ITS STRATIGRAPHIC AND PALEOGEOGRAPHIC SETTING

Pages: 237 - 244

Authors: VOLKER HOCK, ANDRZEJ SLACZKA, MARIAN A. GASINSKI, MARTA BAK

Abstract: Biostratigraphic investigations of pelitic intercalations and pebbles within the Konradsheim Limestone (Gresten Unit, “Gresten Klippen Zone”) in the area of Konradsheim and Pechgraben — Maria Neustift (Lower and Upper Austria) imply that at least a part of that limestone is Cretaceous and not only Jurassic in age. In marly intercalations Foraminifera assemblages with Caudammina ovulum were found, in addition some pebbles in conglomeratic limestones contain Radiolaria of Early Cretaceous age. Therefore, the sedimentation of the Konradsheim Limestone lasted at least to the Early Cretaceous. The provenance of the Cretaceous Radiolaria bearing limestones is interesting, as north from the anticipated paleogeographical position of the Gresten Unit (European Platform) there are no similar deposits; they are only known from the Alpine realm. Implications for the Alpine and Carpathian geodynamic evolution are discussed.

Keywords: Cretaceous, Eastern Alps, Gresten Unit, Foraminifera, Radiolaria, Konradsheim Limestone

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