Earth:Exter Formation

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Exter Formation
Stratigraphic range: Rhaetian
~208–201 Ma
WAK UETTERODA SANDSTEIN.jpg
Exter Formation at Krauthausen
TypeFormation
Unit ofKeuper
Sub-unitsRinteln, Oeynhausen & Vahlbruch Subformations
UnderliesBlack Jurassic
OverliesArnstadt & Trossingen Formations
ThicknessTypically 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
PrimaryClaystone, siltstone, sandstone
OtherCoal
Location
Coordinates [ ⚑ ] : 48°36′N 9°06′E / 48.6°N 9.1°E / 48.6; 9.1
Paleocoordinates [ ⚑ ] 36°06′N 10°48′E / 36.1°N 10.8°E / 36.1; 10.8
RegionNiedersachsen, Baden-Württemberg, Westphalia, Bavaria
Country Germany
ExtentWidespread
Exter Formation is located in Germany
Exter Formation
Exter Formation
Exter Formation
Exter Formation
Exter Formation
Exter Formation
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

Therapsids

  • Chalepotherium plieningeri

Reptiles


Fish


Insects

  • Triassothemis gartzii[5]

Flora

  • Becklesia franconica[6]

See also

  • List of fossiliferous stratigraphic units in Germany

References

  1. 1.0 1.1 Exter Formation at Fossilworks.org
  2. 2.0 2.1 Rhätkeuper at Fossilworks.org
  3. Wintrich et al., 2017
  4. Fraas, 1897
  5. Bapth et al., 2013
  6. Van Konijnenburg-van Cittert et al., 2021

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. Polish Journal of Entomology 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. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie 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. Zeitschrift der Deutschen Geologischen Gesellschaft 49. 482–485.
  • Plieninger, W. H. 1847. Zahne aus der oberen Grenzbreccie des Keupers bei Degerloch und Steinenbronn. Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg 3. 164–167.