Tufs et calcaires de Rosan Stratigraphic range: Katian-Hirnantian (Kralodvorian-Kosovian) ~ | |
---|---|
Type | Formation |
Lithology | |
Primary | Tuff, limestone |
Other | Pillow lava, claystone, sandstone |
Location | |
Coordinates | 48°18′N4°12′W / 48.3°N 4.2°W Coordinates: 48°18′N4°12′W / 48.3°N 4.2°W |
Approximate paleocoordinates | 70°18′S53°54′E / 70.3°S 53.9°E |
Region | Finistère |
Country | France |
Extent | Armorican Massif |
Type section | |
Named for | 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]
The formation has provided fossils of: [1] [2]
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