Geologic map of the East Portal quadrangle, Boulder, Gilpin, and Grand counties, Colorado /

Bibliographic Details
Corporate Author:	Geological Survey (U.S.)
Other Authors:	Young, Edward J. (Edward Joseph), 1923-
Format:	Government Document Map
Language:	English
Published:	Reston, Va. : The Survey ; 1991.
Series:	Miscellaneous investigations series (Geological Survey (U.S.)) ; I-2212.
Subjects:	Geology > Colorado > Boulder County > Maps. Geology > Colorado > Gilpin County > Maps. Geology > Colorado > Grand County > Maps.

Description
Item Description:	Relief shown by contours and spot heights. "Geology by Young, 1986-1988." Includes text, bibliography, index map, location map, and graph. Cartographic material.
Physical Description:	1 map : color ; 58 x 44 cm., on sheet 76 x 81 cm., folded in envelope 30 x 24 cm.