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 | Arnstadt & 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 |   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
Reptiles
Fish
- Ceratodus cloacinus
- C. heteromorphus
- C. parvus
- C. trapezoides
- Hybodus cloacinus
- H. sublaevis
- Lissodus minimus
- Nemacanthus monilifer
- Sargodon tomicus
- Acrodus sp.
- Asterolepis sp.
- Raja sp.
Insects
- Triassothemis gartzii[5]
Flora
- Becklesia franconica[6]
See also
References
- ^ a b Exter Formation at Fossilworks.org
- ^ a b Rhätkeuper at Fossilworks.org
- ^ Wintrich et al., 2017
- ^ Fraas, 1897
- ^ Bapth et al., 2013
- ^ Van Konijnenburg-van Cittert et al., 2021
Bibliography
- ‹ The template below (Cite LSA) is being considered for deletion. See templates for discussion to help reach a consensus. ›
doi:10.1016/j.revpalbo.2021.104398
- ‹ The template below (Cite LSA) is being considered for deletion. See templates for discussion to help reach a consensus. ›
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. .
- ‹ The template below (Cite LSA) is being considered for deletion. See templates for discussion to help reach a consensus. ›
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. .
- ‹ The template below (Cite LSA) is being considered for deletion. See templates for discussion to help reach a consensus. ›
v. Huene, F. 1940. Fossilium Catalogus. I: Animalia. Pars 93: Mammalia Triadica, 1-13. F. Quenstedt (ed.).
- ‹ The template below (Cite LSA) is being considered for deletion. See templates for discussion to help reach a consensus. ›
Hennig, E. 1922. Die Säugerzähne des württembergischen Rhät-Lias-Bonebeds. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie 46. 181–267. .
- ‹ The template below (Cite LSA) is being considered for deletion. See templates for discussion to help reach a consensus. ›
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. .
- ‹ The template below (Cite LSA) is being considered for deletion. See templates for discussion to help reach a consensus. ›
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. .
