Long abandoned quarry at the crossing of RN 89 and N 141 c roads. Part of a private property and inaccessible.
Oligocene marls and arkoses thermically metamorphized by trachy-basalt lava flow of Beaumont volcano.
References:
- Grunhagen, H. et al. (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:8 entries listed. 8 valid minerals.
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