Geology (51/229)

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Glacial polish and deep grooves scoured into Devonian age limestone by forces of the Wisconsin Glacier. Glacial Grooves State Memorial, Kelleys Island (Lake Erie), Ohio, USA. A National Natural Landmark.
Glacial polish and deep grooves scoured into Devonian age limestone by forces of the Wisconsin Glacier. Glacial Grooves State Memorial, Kelleys Island (Lake Erie), Ohio, USA. A National Natural Landmark.
Filename: GLGRV023.jpg
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