Grand-Auverné Formation

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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]

Grand Auverné Formation
Stratigraphic range: Darriwilian-Sandbian (Dobrotivian)
~461–457.5 Ma
TypeFormation
Sub-unitsSchistes d'Angers Member
Lithology
PrimaryOrganic shale
OtherSand and pyrite
Location
Coordinates47°00′N 1°00′W / 47.0°N 1.0°W / 47.0; -1.0
Approximate paleocoordinates68°12′S 76°00′E / 68.2°S 76.0°E / -68.2; 76.0
RegionMaine-et-Loire
Country France
Grand-Auverné Formation is located in France
Grand-Auverné Formation
Grand-Auverné Formation (France)
Grand-Auverné Formation is located in Pays de la Loire
Grand-Auverné Formation
Grand-Auverné Formation (Pays de la Loire)

Description

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The formation comprises dark shales with fine laminations, fossiliferous nodules, and occasional lenticles, bioturbation, sand and pyrite.[2]

Fossil content

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The following fossils were reported from the formation:[2][3]

Trilobites

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Graptoloidea

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See also

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References

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Bibliography

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  • 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