The Middle Miocene Badenian stratotype at Baden-Sooss (Lower Austria)

摘要

The brickyard of Baden-Sooss, in the Austrian part of the Vienna Basin was selected as the stratotype of theMiddle Miocene regional stage Badenian for the Central Paratethys. Stratigraphy and correlation are up-dated, and thepresent state of the art on fossil groups is shown. The stratotype belongs to the Upper Lagenidae Zone in a regional paleo-ecological zonation. For interregional correlation the section belongs to a part of calcareous nannoplankton Zone NN5without Helicosphaera waltrans, to dinocyst Zone Cte, and in planktonic foraminiferal zonation by the occurrence ofOrbulina suturalis to Zone M6, and to the middle part of the Langhian stage. The sediments of the so-called "BadenerTegel" are part of the Baden Formation, correlated with the Lanzhot Formation in the Czech and Slovak part of the basin.Deposition of the calcareous silty clays occurred at a water depth of around 200 m in a relatively warm, well-stratifiedwater column. Re-deposition of fossiliferous coarser sediments from shallow regions occurs.