Exter Formation

Exter Formation Stratigraphic range: Rhaetian ~208–201 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Exter Formation at Krauthausen
Type	Formation
Unit of	Keuper
Sub-units	Rinteln, Oeynhausen & Vahlbruch Subformations
Underlies	Black Jurassic
Overlies	& Trossingen Formations
Thickness	Typically between 100 and 150 m (330 and 490 ft) Locally 250 m (820 ft) in northern Germany Up to 45 m (148 ft) in southern Germany
Lithology
Primary	Claystone, siltstone, sandstone
Other	Coal
Location
Coordinates	48°36′N 9°06′E / 48.6°N 9.1°E / 48.6; 9.1Coordinates: 48°36′N 9°06′E / 48.6°N 9.1°E / 48.6; 9.1
Approximate paleocoordinates	36°06′N 10°48′E / 36.1°N 10.8°E / 36.1; 10.8
Region	Niedersachsen, Baden-Württemberg, Westphalia, Bavaria
Country	Germany
Extent	Widespread
Exter Formation (Germany)

The Exter Formation is the only formation of the Upper Keuper or Rhätsandstein, and is a geologic formation in Germany. It preserves fossils dating back to the Rhaetian of the Triassic period (specifically around 205 Ma).^[1][2]

Fossil content[]

The formation has provided fossils of:^[1][2]

Mammals[]

• Thomasia antiqua
• Haramiyidae indet.

Therapsids[]

• Chalepotherium plieningeri

Reptiles[]

Fish[]

Insects[]

• ^[5]

Flora[]

• ^[6]

See also[]

• List of fossiliferous stratigraphic units in Germany

References[]

Bibliography[]

• Van Konijnenburg-van Cittert, J. H. A.; C. Pott; S. Schmeißner; G. Dütsch, and E. Kustatscher. 2021. The Rhaetian flora of Wüstenwelsberg, Bavaria, Germany: Description of selected gymnosperms (Ginkgoales, Cycadales, Coniferales) together with an ecological assessment of the locally prevailing vegetation. Review of Palaeobotany and Palynology in press. .. doi:10.1016/j.revpalbo.2021.104398
• Wintrich, T.; S. Hayashi; A. Houssaye; Y. Nakajima, and P. M. Sander. 2017. A Triassic plesiosaurian skeleton and bone histology inform on evolution of a unique body plan. Science Advances 3. e1701144.
• Barth, G.; A. Nel, and M. Franz. 2013. Two new odonate-like insect wings from the latest Norian of northern Germany. 82. 127–142.
• v. Huene, F. 1940. Fossilium Catalogus. I: Animalia. Pars 93: Mammalia Triadica, 1-13. F. Quenstedt (ed.).
• Hennig, E. 1922. Die Säugerzähne des württembergischen Rhät-Lias-Bonebeds. 46. 181–267.
• Fraas, E. 1897. Reste von Zanclodon aus dem oberen Keuper vom Langenberge bei Wolfenbüttel - Remains of Zanclodon from the upper Keuper of Langenberge near Wolfenbüttel. 49. 482–485.
• Plieninger, W. H. 1847. Zahne aus der oberen Grenzbreccie des Keupers bei Degerloch und Steinenbronn. 3. 164–167.