Latitude: 45°44'53"N
Longitude: 3°4'15"E
Long abandoned quarry at the crossing of RN 89 and N 141 c roads. Other samples have been found above the quarry during housing construction. Part of a private property and now inaccessible.
Oligocene marls and arkoses thermally metamorphosed by trachy-basalt lava flow of Puy de Gravenoire volcano.
References
- Grünhagen H and Mergoil J (1963) Découverte d'hydrocalumite et afwillite associées à l'ettringite dans les porcélanites de Boisséjour près Ceyrat (Puy de Dôme). Bulletin de la Société Française de Minéralogie et de Cristallographie 86: 149-157.
- Revel, C. (1996). "La carrière de Boisséjour." Magazine du 4M, 16(162), 4-5.
Mineral List
9 entries listed. 8 valid minerals.
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