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Gossan and alteration zone around a VMS lens in the Visean Brévenne unit, French Massif Central, Hercynian belt, in Carrière Saint-Antoine near St-Pierre la Palud, France. PhotoID272

Gossan and alteration zone around a VMS lens in the Visean Brévenne unit, French Massif Central, Hercynian belt, in Carrière Saint-Antoine near St-Pierre la Palud, France. PhotoID272

Photograph: JF Moyen