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Diabase intrusion in Granite
Here are two igneous rocks, a dark, mafic diabase cutting through a gray-pink granit… https://t.co/h43kOkYl1y http://pic.twitter.com/vxJeFFx5x5

— ccarrigan (@GeosciImaging) April 10, 2017

via Twitter https://twitter.com/GeosciImaging

April 10, 2017 at 10:38PM