Tufs et calcaires de Rosan

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)
~450–443.7 Ma
Geologic map of the Armorican Massif
TypeFormation
Lithology
PrimaryTuff, limestone
OtherPillow lava, claystone, sandstone
Location
Coordinates48°18′N 4°12′W / 48.3°N 4.2°W / 48.3; -4.2
Approximate paleocoordinates70°18′S 53°54′E / 70.3°S 53.9°E / -70.3; 53.9
RegionFinistère
Country France
ExtentArmorican Massif
Type section
Named forRosan
Tufs et calcaires de Rosan is located in France
Tufs et calcaires de Rosan
Tufs et calcaires de Rosan (France)
Tufs et calcaires de Rosan is located in Brittany
Tufs et calcaires de Rosan
Tufs et calcaires de Rosan (Brittany)

Fossil content

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The formation has provided fossils of:[1][2]

Strophomenata

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Rhynchonellata

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See also

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References

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  1. ^ a b Tufs et calcaires de Rosan at Fossilworks.org
  2. ^ Melou, 1990

Bibliography

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  • 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