Tereñes Formation
Late Jurassic geologic formation in Spain
From Wikipedia, the free encyclopedia
The Tereñes Formation or Tereñes Marl is a Late Jurassic (Kimmeridgian) geologic formation in Asturias, Spain. The grey marls of the formation were deposited in a lagoonal environment at a muddy coast along a temporary inland sea. The lower section of the formation comprises silty and chalky sandstones with desiccation cracks and ripple marks, then becomes a bituminous, prominently ostracod-bearing, pelecypod shell chalk, lime chalk marl and marl.[1] Fossil tracks have been reported from the formation.[2] The Terenes and Lastres Formations are regarded as lateral equivalents.[3]
| Tereñes Formation | |
|---|---|
| Stratigraphic range: Kimmeridgian ~ | |
| Type | Geological formation |
| Underlies | Lastres Formation |
| Overlies | Vega Formation |
| Thickness | 400 metres |
| Lithology | |
| Primary | Marl |
| Other | Sandstone |
| Location | |
| Coordinates | 43.5°N 5.2°W |
| Approximate paleocoordinates | 35.6°N 7.0°E |
| Region | Asturias |
| Country | Spain |
  Tereñes Formation (Spain)  Tereñes Formation (Asturias) | |