Baden Marl, significant marine sediment of the former Vienna Basin Sea (typical location is the Baden brickfield). As there is an abundance of small and large fossils and as the Baden Marl can easily be classified, the geological age lasting from 16,500,000 to 13,300,000 B.C. (pre-Tethys) in the area of the ancient European Mediterranean Sea (extending from the Alpine Geosyncline in Switzerland to the Aral Sea) has been designated "Badenia". In some places this sediment zone reaches a thickness of up to 1,500 m. Underneath the Vienna Basin it is composed of several tiers of sandstone, which constitute the largest petroleum reservoir in the area ( Matzen Sand).
Literature#E. Thenius, Geologie der oesterreichischen Bundeslaender, vol. Niederoesterreich, 21974.