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| System | Series | Stage | Age (Ma) | European lithostratigraphy |
|---|---|---|---|---|
| Jurassic | Lower | Hettangian | younger | Lias |
| Triassic | Upper | Rhaetian | 201.4–208.5 | |
| Keuper | ||||
| Norian | 208.5–227.0 | |||
| Carnian | 227.0–237.0 | |||
| Middle | Ladinian | 237.0–242.0 | ||
| Muschelkalk | ||||
| Anisian | 242.0–247.2 | |||
| Bunter or Buntsandstein | ||||
| Lower | Olenekian | 247.2–251.2 | ||
| Induan | 251.2–251.9 | |||
| Permian | Lopingian | Changhsingian | older | |
| Zechstein | ||||
| Major lithostratigraphic units of northwest Europe with the ICS's geologic timescale of the Triassic.[1] | ||||
The Keuper is a lithostratigraphic unit (a sequence of rock strata) in the subsurface of large parts of west and central Europe.[2] The Keuper consists of dolomite, shales or claystones and evaporites that were deposited during the Middle and Late Triassic epochs (about 220 million years ago). The Keuper lies on top of the Muschelkalk and under the predominantly Lower Jurassic Lias or other Early Jurassic strata.
The Keuper together with the Muschelkalk and the Buntsandstein form the Germanic Trias Group, a characteristic sequence of rock strata that gave the Triassic its name.[3]
- ^ Ogg, Ogg & Gradstein 2016
- ^ Howe 1911, p. 766.
- ^ "Muschelkalk (geology)", Britannica Online Encyclopedia, October 2010, webpage: EB-39.