The Tufs et calcaires de Rosan is a geologic formation in France. It preserves fossils dating back to the Katian to Hirnantian (Kralodvorian to Kosovian in the regional stratigraphy) stages of the Late Ordovician period.[1]
| Tufs et calcaires de Rosan | |
|---|---|
| Stratigraphic range: Katian-Hirnantian (Kralodvorian-Kosovian) ~ | |
 Geologic map of the Armorican Massif | |
| Type | Formation |
| Lithology | |
| Primary | Tuff, limestone |
| Other | Pillow lava, claystone, sandstone |
| Location | |
| Coordinates | 48°18′N 4°12′W / 48.3°N 4.2°W |
| Approximate paleocoordinates | 70°18′S 53°54′E / 70.3°S 53.9°E |
| Region | Finistère |
| Country |  France |
| Extent | Armorican Massif |
| Type section | |
| Named for | Rosan |
  Tufs et calcaires de Rosan (France)  Tufs et calcaires de Rosan (Brittany) | |
Fossil content edit
The formation has provided fossils of:[1][2]
Strophomenata edit
Rhynchonellata edit
See also edit
References edit
- ^ a b Tufs et calcaires de Rosan at Fossilworks.org
- ^ Melou, 1990
Bibliography edit
- M. Melou. 1990. Brachiopodes articules de la coupe de l'ile de Rosan (Crozon, Finistere); formation des tufs et calcaires de Rosan (Caradoc-Ashgill). Géobios 23(5):539-579