Friday, June 12, 2015

Rhyolite, Career Boardwalk, Puy de Dome, France

Rhyolite by Yvan LEMEUR

(Career boardwalk, near La Bourboule - Puy de Dome - France)

Very glassy rock in silica, feldspar and hornblende. Red coloration due to the presence of iron oxides. Thick pouring over the chaotic rhyolitic breccia

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