For #ThinSectionThursday: Coolidge, Kansas ungrouped C4 #meteorite viewed in cross polarized light. http://pic.twitter.com/QAMLxvPuut
— Peter Scherff (@PeterScherff) October 20, 2016
via Twitter https://twitter.com/PeterScherff
October 20, 2016 at 06:46PM
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