Located about 5 km NE of Beaujeu and 10 km SW of Mâcon.
Veins and stratiform deposits in liassic sediments.
Production : 400,000 tons MnO2.
References:
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 954.
Bariand, P., F. Cesbron and J. Geffroy (1977), "Les minéraux, leurs gisements, leurs associations," Editions Minéraux et Fossiles.
Mineral List:9 entries listed. 8 valid minerals. 2 type localities (valid minerals).
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