Badlands of South Dakota, Brule and Chadron Formations. From the Geology Teaching Slides of Dr. Arthur Gibbs Sylvester.
Thursday, September 22, 2011
Brule and Chadron Formations
Badlands of South Dakota, Brule and Chadron Formations. From the Geology Teaching Slides of Dr. Arthur Gibbs Sylvester.
Labels:
arthur gibbs sylvester,
geology,
mountains,
road
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