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You are browsing the archive for 2018 May 07.

7 May 2018

2/3 pass rate on determining geopetal “up”

A visual challenge via Twitter to determine stratigraphic younging direction ends with equivocal results. So let’s use GIGAmacro imagery to school your sedimentological students on how three primary sedimentary structures look different right-side-up versus up-side-down.

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