Carboniferous limestone boulder from the Badenian clastics (Carpathian Foredeep, Czech Republic): A useful data source on the Palaeozoic of the Moravosilesian Basin

Abstract

of the Moravosilesian Basin in Czech Republic (Fig. 1) has rarely been documented. Brachiopods have only briefly been discussed or mentioned (e.g. Rak et al. 2012) and trilobites were depicted and described by Chlupáč (1961, 1966) and Rak et al. (2012). The Palaeozoic sequences of the Moravosilesian Basin were exposed to extensive erosion. However, eroded material has been partly preserved in younger sedimentary units, mainly Variscan and Carpathian flysch and molasse sediments. The composition of basal and marginal coarse clastics deposited during the early Badenian transgression in the Carpathian Foredeep reflects the varied provenance of the source material (Brzobohatý & Cicha 1993). Krystek (1974) has recognized 14 types of rock clasts of these clastics between Brno and Prostějov. Dark grey limestone clasts have generally been considered Devonian (e.g. Šob 1940, Krystek 1974), but they have not been studied in detail. In this study, we share information obtained from a limestone boulder, showing that it is of late Tournaisian age, thereby enabling us to contribute to the discussion regarding the provenance of Badenian basal clastics. Brachiopod and trilobite fauna of this boulder proves valuable with respect to our knowledge of the Palaeozoic macrofauna of the Moravosilesian Basin.