Badlands of South Dakota, Brule and Chadron Formations. From the Geology Teaching Slides of Dr. Arthur Gibbs Sylvester.
Showing posts with label mountains. Show all posts
Showing posts with label mountains. Show all posts
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.
Subscribe to:
Posts (Atom)