#ThinsectionThursday A little bit of zoning in a plagioclase phenocryst from Gunung Sumbing, a #volcano that is part of the #Sunda Arc in #Java, #Indonesia. pic.twitter.com/7NID9vo54V
— Colin Macpherson (@VolColMac) May 2, 2019
via Twitter https://twitter.com/VolColMac
May 02, 2019 at 05:53PM
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