mossy-rox: “The Comet” Oxidized euhedral pyroxene crystals in ashy groundmass of volcani
mossy-rox:“The Comet”Oxidized euhedral pyroxene crystals in ashy groundmass of volcanic tuff. Explosive volcanic eruption likely caused the two pyroxene grains to smash together, causing this comet and tail-like shape. Maybe my eyes are playing tricks on me but the angles in that crystal look an awful lot like 60 degree angles - I think that looks a lot like an amphibole. -- source link
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