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Exter Formation
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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]
Quick Facts Type, Unit of ...
Exter Formation | |
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Stratigraphic range: Rhaetian ~208–201 Ma | |
![]() 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 | 48.6°N 9.1°E / 48.6; 9.1 |
Approximate paleocoordinates | 36.1°N 10.8°E / 36.1; 10.8 |
Region | Niedersachsen, Baden-Württemberg, Westphalia, Bavaria |
Country | ![]() |
Extent | Widespread |
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