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	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]