Grand-Auverné Formation
| Grand Auverné Formation | |
|---|---|
| Stratigraphic range: Darriwilian-Sandbian (Dobrotivian) ~ | |
| Type | Formation |
| Sub-units | Schistes d'Angers Member |
| Lithology | |
| Primary | Organic shale |
| Other | Sand and pyrite |
| Location | |
| Coordinates | 47°00′N 1°00′W / 47.0°N 1.0°W |
| Approximate paleocoordinates | 68°12′S 76°00′E / 68.2°S 76.0°E |
| Region | Maine-et-Loire |
| Country | France |
  Grand-Auverné Formation (France)  Grand-Auverné Formation (Pays de la Loire) | |
The Grand Auverné Formation is a geologic formation in France. It preserves fossils dating back to the Darriwilian to Sandbian (Dobrotivian in the regional stratigraphy) stages of the Ordovician period.[1]
Description
The formation comprises dark shales with fine laminations, fossiliferous nodules, and occasional lenticles, bioturbation, sand and pyrite.[2]
Fossil content
The following fossils were reported from the formation:[2][3]
Trilobites
- Basilicus sp.
- Bumastus sp.
- Colpocoryphe sp.
- Dionide sp.
- Eccoptochile sp.
- Ectillaenus sp.
- Eodalmanitina sp.
- Neseuretus sp.
- Nobiliasaphus sp.
- Ogygites sp.
- Pateraspis sp.
- Placoparia sp.
- Prionocheilus sp.
- Salterocoryphe sp.
- Selenopeltis sp.
- Uralichas sp.
- Zeliszkella sp.
- ?Onnia sp.
Graptoloidea
See also
References
- ^ Grand Auverné Formation at Fossilworks.org
- ^ a b Schistes d'Angers, Grand Auverné Fm at Fossilworks.org
- ^ Pillet, 1993
Bibliography
- J. Pillet. 1993. La faune des "Schistes a nodules" d'Angers (Llandeilo inferieur); I, Les trilobites. Memoire - Societe d'Etudes Scientifiques de l'Anjou 12