Tufs et calcaires de Rosan
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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]
Quick Facts Type, Lithology ...
Tufs et calcaires de Rosan | |
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Stratigraphic range: Katian-Hirnantian (Kralodvorian-Kosovian) ~450–443.7 Ma | |
Type | Formation |
Lithology | |
Primary | Tuff, limestone |
Other | Pillow lava, claystone, sandstone |
Location | |
Coordinates | 48.3°N 4.2°W / 48.3; -4.2 |
Approximate paleocoordinates | 70.3°S 53.9°E / -70.3; 53.9 |
Region | Finistère |
Country | France |
Extent | Armorican Massif |
Type section | |
Named for | Rosan |
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