The ichnologic record (bioturbation and bioerosion) of the Jurassic transgression at the Hády Quarry at Brno, Czech Republic

 

Radek Mikuláš, Miroslav Bubík

Geoscience Research Reports 44, 2011 (GRR for 2010), pages 113–116
Map sheets: Vyškov (24-41)

Full text (PDF, 0.38 MB)

 

Abstract

Borings of the ichnogenera Gastrochaenolites and Entobia were found on transgressive sediments of the Late Jurassic at the top part of the Hády Quarry. Finds of G. cf. lapidicus Kelly and Bromley, 1984 come from limestone, marlstone and claystone pebbles of basal carbonaceous conglomerates and detritic limestones. A more diversified assemblage comes from large bioclasts found in the overlying biodetritic limestones: G. cf. lapidicus, G. cf. orbicularis Kelly and Bromley, 1984, Entobia cf. ovula Bromley and D'Alessandro, 1984 and E. aff. retiformis Stephensosn, 1952. The assemblage is contemporaneous with the earliest occurrences of complex multicamerate entobians.