An awesome photo, post, and @geolsoc book call-out by the inimitable @johnjfwalsh: https://t.co/9Nv1ScQxBZ http://pic.twitter.com/ch5cO3FgC6
— Christopher Jackson (@seis_matters) October 28, 2017
via Twitter https://twitter.com/seis_matters
October 28, 2017 at 12:18PM
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