I'm lecturing on Snowball Earth today before turning my students loose on a bunch of diamictites in lab. Check out this gorgeous image of a dropstone in banded iron formation from Galen Halverson of @EPS_McGill, who kindly let me use some of his photos in a Snowball case study. pic.twitter.com/NiufBjQMgP
— Callan Bentley (@callanbentley) April 6, 2021
via Twitter https://twitter.com/callanbentley
April 06, 2021 at 09:24PM
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