The Röt Formation or Rötton Formation (German for Röt Shale), or Upper Buntsandstein, is a geologic formation of the Buntsandstein in Germany. It preserves fossils dating back to the Middle Triassic Epoch (Anisian or Aegean or Bithynian in the regional stratigraphy).Röt Formation at Fossilworks.org The formation overlies the Plattenstein and Solling Formations and is overlain by the Jena Formation.Butler et al., 2011, p.2Butler et al., 2011, p.25
The limestones, mudstones, shales and sandstones of the formation, deposited in a shallow marine environment, have provided fossils of early archosaurs, temnospondyls, fish and insects.
Fossil content The formation has provided the following fossils:
Group Taxa Notes Images Temnospondyls Eocyclotosaurus woschmidti Schoch & Werneburg, 1999Fraser & Rieppel, 2006 Heptasaurus cappelensis (described as Mastodonsaurus cappelensis) Capitosauria indet. Butler et al., 2011 Reptiles Amotosaurus rotfeldensis Ortlam, 1967 Cymatosaurus erikae C. erytheus Rieppel, 1997 C. fridericianus Rieppel, 1999Eifelosaurus triadicus Sclerosaurus armatus Sues & Reisz, 2008 Ctenosauriscidae indet. Fish Selachii indet. Insects Rhoeniella granulata Ansorge, 1994
Correlations Based on the fossils of early archosaurs, the formation is correlated with the Donguz Formation of Russia, the upper Heshanggou Formation of China and the Holbrook Member of the Moenkopi Formation of Arizona.
See also List of fossiliferous stratigraphic units in Germany Anisian formations Besano Formation, fossiliferous formation of the Alps Manda Formation, fossiliferous formation of Tanzania Omingonde Formation, fossiliferous formation of Namibia
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