Andalusite var. chiastolite + cordierite porphyroblasts #spottedslate #ThinSectionThursday http://pic.twitter.com/XkcNzCABFu
— Ruth Siddall (@R_Siddall) November 24, 2016
via Twitter https://twitter.com/R_Siddall
November 24, 2016 at 08:33PM
Andalusite var. chiastolite + cordierite porphyroblasts #spottedslate #ThinSectionThursday http://pic.twitter.com/XkcNzCABFu
— Ruth Siddall (@R_Siddall) November 24, 2016
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