#FieldWorkFriday: these look like modern ripples but are actually latest Ordovician sand waves exposed in a river bed. Anticosti I., Quebec. http://pic.twitter.com/GUvJjy5hmf
— Seth Finnegan (@sethfinnegan1) July 21, 2017
via Twitter https://twitter.com/sethfinnegan1
July 21, 2017 at 09:02PM
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