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]

Exter Formation
Stratigraphic range: Rhaetian
~208–201 Ma
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
Coordinates48°36′N 9°06′E / 48.6°N 9.1°E / 48.6; 9.1
Approximate paleocoordinates36°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)

Fossil content

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

Mammals

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Therapsids

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Reptiles

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Fish

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Insects

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Flora

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See also

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References

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  1. ^ a b Exter Formation at Fossilworks.org
  2. ^ a b 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

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  • Van Konijnenburg-van Cittert, J. H. A.; Pott, C.; Schmeißner, S.; Dütsch, G.; Kustatscher, E. (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, 288 (Article 104398), Bibcode:2021RPaPa.28804398V, doi:10.1016/j.revpalbo.2021.104398
  • Wintrich, T.; Hayashi, S.; Houssaye, A.; Nakajima, Y.; Sander, P. M. (2017), "A Triassic plesiosaurian skeleton and bone histology inform on evolution of a unique body plan", Science Advances, 3 (12): e1701144, Bibcode:2017SciA....3E1144W, doi:10.1126/sciadv.1701144, PMC 5729018, PMID 29242826
  • Barth, G.; Nel, A.; Franz, M. (2013), "Two new odonate-like insect wings from the latest Norian of northern Germany", Polish Journal of Entomology, 82 (3): 127–142, doi:10.2478/v10200-012-0029-4
  • v. Huene, F (1940), Fossilium Catalogus. I: Animalia. Pars 93: Mammalia Triadica, F. Quenstedt (ed.), pp. 1–13
  • 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