| Arnstadt Formation | |
|---|---|
Stratigraphic range: | |
| Type | Formation |
| Unit of | Keuper |
| Underlies | Exter Formation |
| Thickness | 150 m (in Thuringia) |
| Lithology | |
| Primary | Sandstone, Clay |
| Location | |
| Extent | Germany |
The Arnstadt Formation is a geological formation Germany. It is Late Triassic (Norian) in age, and forms part of the Keuper system. It was deposited in a variety of environments, including alluvial plains and playa.[1]