Geologic map of the Casa Grande quadrangle, Colfax County, New Mexico and Las Animas County, Colorado
By: by Charles L. Pillmore.
Contributors: Geological Survey (U.S.)
Series: Geologic quadrangle map -- GQ-823.
Publisher: U.S. Geological Survey
Place of publication: Washington, D.C
Format: Map
Subjects: Geology -- Colorado -- Las Animas County -- Maps.; Geology -- New Mexico -- Colfax County -- Maps.
Genres: Maps.
Other titles: Casa Grande quadrangle, Colfax County, New Mexico and Las Animas County, Colorado.
Notes: Relief shown by contours and spot heights.

"Geology by C.L. Pillmore, 1962-65; assisted by J.C. Clay, 1962, J.O. Maberry, 1963, R.C. Lease, 1964, and P.J. Varney and R.B. Fischer, 1965."

Includes text, columnar section, cross section, and quadrangle location diagram; latter diagram also on envelope.

"Datum is mean sea level."