The Rocca di Verra fault
Rocca di Verra, Gobba di Rollin-Rocca di Verra ridge - Blu Lake area, Champoluc, Ayas, Aosta Valley, Italy
View from the east of the NW-trending subvertical fault filled with listvenite, a strongly metasomatized, very hard fault breccia, consisting of carbonatized serpentinite fragments within a matrix of calcite, Fe-bearing dolomite, quartz, and green Cr-rich mica (fuchsite), sometimes including submillimetric relics of chromite. Photo: Paolo Bosio.