Thin section showing a sample of lava from Ol Doinyo Lengai volcano, located in the Great African Rift 🌍 The colorful grains are calcite, the few grey grains are feldspar crystals ⚒️ https://t.co/4hKIvPieqC pic.twitter.com/dGlDrAiNSH
— David Bressan (@David_Bressan) April 3, 2018
via Twitter https://twitter.com/David_Bressan
April 04, 2018 at 02:06AM
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