World rocks photo collection
Kazakhstan, the valley of the river Ssmall Ulba. Sandstones. Ul'binskaya series. Carboniferous. Visean.
Russia, Caucasus, Karachay-Cherkess Republic, Khasaut River Valley. Apoharzburgite serpentinites. Apophysis of serpentinite massif. Lower Carboniferous, Mississippian?