Předběžné výsledky stratigrafického výzkumu jury na Hádech u Brna

Small remnant of Jurassic sediments at Hady Hill near Brno in Moravia (Czech Republic) comprises 8 m thick conglomerates and detritic limestones and 5 m thick cherty limestones. Pebbles of greenish radiolaria-bearing claystones and marls within the conglomerate are evidence of older Jurassic sedimentation. The detritic limestones contain bivalves Pteroperna sp., Cardita sp., Oxytoma inaequivalvis while the cherty limestones are rich in brachiopods, belemnites, and ammonites assigned to the Transversarium zone by earlier authors. Recorded benthic foraminifers Paalzowella feifeli, Spirillina kuebleri, S. andreae and Trocholina nodulosa indicate the Middle Oxfordian what contradicts the presence of planktonic Globuligerina oxfordiana considered to be Lower Oxfordian marker.