Exposure of an E-W striking barite vein including lead and zinc ores. Host rock is a granite of the Velay formation. Located about 150 m north of Joux village and 6 km east of Allègre, just NW of the D21 road leading from Allègre to Bellevue-la-Montagne.
Ref.: J.-J. Périchaud: "Les Minéraux d'Auvergne", Vol. 2, Clermont-Ferrand (1986)