Item #54707 CRITICAL REVIEW OF THE SAN JUAN PENEPLAIN, SOUTHWESTERN COLORAD; GEOLOGICAL SURVEY PROFESSIONAL PAPER 549-I. Thomas A. Steven.

CRITICAL REVIEW OF THE SAN JUAN PENEPLAIN, SOUTHWESTERN COLORAD; GEOLOGICAL SURVEY PROFESSIONAL PAPER 549-I

Washington, DC: United States Geological Survey / USGS / Government Printing Office / GPO, 1968. Soft cover. Fine. Item #54707

The volcanic and geomorphic history of the San Juan Mountains indicates no peneplain cycle of erosion between the end of major volcanism and the present time. 19 pages with references plus folded geologic map in the rear pocket. Bound in original gray thick paper covers printed in black. Owner's signature to the front cover. A fine copy.

Price: $25.00