Grand-Auverné Formation
# Grand-Auverné Formation

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.

## Description

The formation comprises dark shales with fine laminations, fossiliferous nodules, and occasional lenticles, bioturbation, sand and pyrite.

## Fossil content

The following fossils were reported from the formation:

### 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

* Didymograptus sp.
