1896 cross sections from the Lake District, UK including the Skiddaw Slate within the Kirkstile Formation #geology #thestoryofslate http://pic.twitter.com/qbOsmTU2NO
— John Van Hoesen (@Taconic_Musings) November 24, 2016
via Twitter https://twitter.com/Taconic_Musings
November 24, 2016 at 07:31AM
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