A clot of interlocking plagioclase and olivine crystals from the 2014-2015 #Holuhraun eruption on #Iceland. This is a little gabbro hitch-hiker, transported from depth by the rising magma! Happy #thinsectionthursday! pic.twitter.com/hQtYSzqB1X
— Frances Deegan (@FMDeegan) November 1, 2018
via Twitter https://twitter.com/FMDeegan
November 01, 2018 at 03:27PM
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