Mylonitic augengneisses at Moulin de Sézinieux near La Valla, France. They belong to a ca. 320 Ma extensionnal detachment, the Pilat Fault, that accomodates the exhumation of the Velay complex and bounds the Saint-Etienne Carboniferous basin to the South.
PhotoID270
Mylonitic augengneisses at Moulin de Sézinieux near La Valla, France. They belong to a ca. 320 Ma extensionnal detachment, the Pilat Fault, that accomodates the exhumation of the Velay complex and bounds the Saint-Etienne Carboniferous basin to the South.
PhotoID270
Photograph: JF Moyen