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9th Annual Smithsonian Magazine Photo Contest Natural World
Presque Isle River - Upper Peninsula: The finely terraced rock over which the river flows is called the Nonesuch Shale. It is composed of sand and clay particles that were deposited in a shallow l

Presque Isle River - Upper Peninsula: The finely terraced rock over which the river flows is called the Nonesuch Shale. It is composed of sand and clay particles that were deposited in a shallow lake that covered this area. The round potholes in th

Photo Detail
Date Taken: 09.2011
Date Uploaded: 11.2011
Photo Location: Michigan, United States of America
Camera: NIKON D90
Copyright: © Richard Cleis