Exter Formation

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)

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]