Tufs et calcaires de Rosan
| Tufs et calcaires de Rosan | |
|---|---|
| Stratigraphic range: Katian-Hirnantian (Kralodvorian-Kosovian) ~450–443.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
 Geologic map of the Armorican Massif | |
| Type | Formation |
| Lithology | |
| Primary | Tuff, limestone |
| Other | Pillow lava, claystone, sandstone |
| Location | |
| Coordinates |   Tufs et calcaires de Rosan (France) Show map of France Tufs et calcaires de Rosan (Brittany) Show map of Brittany |
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]
Fossil content
The formation has provided fossils of:[1][2]
Strophomenata
- Hedstroemina sp.
- Iberomena sp.
- Leptaena sp.
- Leptestiina sp.
Rhynchonellata
- Porambonites sp.
- Eoanastrophia sp.
- Rostricellula sp.
- ?Dalmanella sp.
- Bancroftina sp.
- Nicolella sp.
- Retrorsirostra sp.
- Ptychopleurella sp.
- Dolerorthis sp.
- Mcewanella sp.
- Aberia sp.
- ?Rhactorthis sp.
See also
References
- ^ a b Tufs et calcaires de Rosan at Fossilworks.org
- ^ Melou, 1990
Bibliography
- 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
