The Tufs et calcaires de Rosan is a geologic formation in France. It preserves fossils dating back to the Katian to Hirnantian ( to in the regional stratigraphy) stages of the Late Ordovician period.
The Tufs et calcaires de Rosan is a geologic formation in France. It preserves fossils dating back to the Katian to Hirnantian ( to in the regional stratigraphy) stages of the Late Ordovician period. (en)
The Tufs et calcaires de Rosan is a geologic formation in France. It preserves fossils dating back to the Katian to Hirnantian ( to in the regional stratigraphy) stages of the Late Ordovician period. (en)