Augite trachyte from Vesuvius #thinsectionthursday pic.twitter.com/e4LKNQs7c4
— Dr Ruth Siddall (@R_Siddall) December 6, 2018
via Twitter https://twitter.com/R_Siddall
December 07, 2018 at 02:21AM
Augite trachyte from Vesuvius #thinsectionthursday pic.twitter.com/e4LKNQs7c4
— Dr Ruth Siddall (@R_Siddall) December 6, 2018
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