Geologic map of the Black Ridge quadrangle, Delta and Montrose Counties, Colorado /

Bibliographic Details
Main Author:	Hansen, Wallace R., 1920-
Corporate Author:	Geological Survey (U.S.)
Format:	Government Document Map
Language:	English
Published:	Washington, D.C. : The Survey, 1968.
Series:	Geologic quadrangle map ; GQ-747.
Subjects:	Geology > Colorado > Delta County > Maps. Geology > Colorado > Montrose County > Maps.

Description
Item Description:	Relief shown by contours and spot heights. "Geology mapped by W.R. Hansen, 1965-66, assisted by J.J. Antony, J.B. Hansen, and E.E. McGregor." "Datum is mean sea level." "Base by U.S. Geological Survey, 1955." Includes text, 3 col. cross-sections, columnar section, and location map. Location map on envelope. Cartographic material.
Physical Description:	1 map : color ; 58 x 45 cm., on sheet 84 x 94 cm., folded in envelope 30 x 24 cm.