Rottweil formation
The Rottweil Formation (formerly also Trigonodus- Dolomite) is a lithostratigraphic formation of the Upper Muschelkalk in the Germanic Triassic in geosciences . The Rottweil Formation interlocks laterally with the Meißner and Grafenwöhr Formations and is also underlain by these formations. It is overlaid by the Erfurt formation of the Lower Keuper .
definition
The basis of the Rottweil formation is defined with the onset of the dolomites . The deposits of the Rottweil formation consist of thick-banked, yellowish weathered Dolomites, dolomitic limes and limestone marls. Stromatolite crusts are also widespread in the upper part , as is the so-called "hangendoolite". The thickness of the Rottweil formation is up to max. 22 m. It is essentially limited to southern Germany and Alsace. To the north, towards the deeper part of the basin, it meshes with the Meißner formation . The type locality is near Rottweil . The base of the Rottweil Formation is close to the lower limit of the Ladinium ( Middle Triassic ) and is therefore likely to be limited to the lower sections of the Ladinium. It was named after the town of Rottweil in Baden-Württemberg.
Breakdown
The Rottweil formation is currently not (yet) further subdivided.
Fossils
The Rottweil formation contains very common but poorly preserved mussels (bivalvia) in some layers , including the genus Trigonodus, which gave its name to the former name Trigonodus -Dolomite . It is placed in the order Unionida of the Palaeoheterodonta . Were also found arthropods and vertebrate teeth in the shape genus Zanclodon are provided. The type species of this genus may belong to Plateosaurus .
literature
- Hans Hagdorn and Theo Simon: The Muschelkalk in the Stratigraphic Table of Germany 2002. Newsletters on Stratigraphy, 41 (1-3): 143-158, Berlin & Stuttgart 2005 ISSN 0078-0421
Web links
- German Stratigraphic Commission (Ed.): Stratigraphische Tisch von Deutschland 2002 . Potsdam 2002, ISBN 3-00-010197-7 - PDF; 6.57 MB (abbreviated STD2002)