Hello Twitter. What’s this? Not the pen - the rock behind. It’s a subvertical cut through a Silurian shallow marine sandstone bed. Some weird strain related mineralisation? Bioturbation? pic.twitter.com/J5i8T5u1PE
— Ian Kane (@SedLogic) July 22, 2019
via Twitter https://twitter.com/SedLogic
July 22, 2019 at 10:12PM
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