By: magic-gigapans
Image: Callan Bentley, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 4 May 2020
Last Updated: 20 May 2020

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Llewellyn Formation, latest Pennsylvanian (the time period) of eastern Pennsylvania (the state). https://en.wikipedia.org/wiki/Llewellyn_Formation