Geologic map of the Fort Wilkins quadrangle, Michigan : bedrock geology.

Bibliographic Details
Main Author:	Cornwall, Henry R. (Henry Rowland), 1913-
Corporate Author:	Geological Survey (U.S.)
Format:	Government Document Map
Language:	English
Published:	Washington : U.S. Geological Survy, 1955.
Series:	Geologic quadrangle map ; GQ-74.
Subjects:	Geology > Michigan > Keweenaw County > Maps.

Description
Item Description:	"Contour interval 20 feet." Includes text and col. sections. Cartographic material.
Physical Description:	1 map : color ; 58 x 40 cm., on sheet 76 x 127 cm., folded in envelope 30 x 24 cm.