Zinc-lead-copper resources and general geology of the Upper Mississippi Valley district
By: by Allen V. Heyl ... [et al.] ; prepared in cooperation with the Wisconsin Geological and Natural History Survey, the Illinois State Geological Survey, and the Iowa Geological Survey.
Contributors: Heyl, Allen Van, 1918-; Wisconsin Geological and Natural History Survey.; Illinois State Geological Survey.; Iowa Geological Survey.
Series: Contributions to economic geology; Geological Survey bulletin -- 1015-G
Publisher: U.S. G.P.O.
Published: 1955
Place of publication: Washington
Language: eng
Number of pages: 245
Subjects: Geology -- Mississippi River Valley.; Ore deposits -- Mississippi River Valley.; Zinc mines and mining -- Mississippi River Valley.; Lead mines and mining -- Mississippi River Valley.; Copper mines and mining -- Mississippi River Valley.; Geology, Economic -- Mississippi River Valley.; Zinc ores -- Mississippi River Valley.; Lead ores -- Mississippi River Valley.; Copper ores -- Mississippi River Valley.; Mines and mineral resources -- Mississippi River Valley.
Notes: Maps on two folded plates in pocket (plates 25-26).

Includes index.

Bibliography: p. 242-243.

Index follows bulletin 1015-I in library's copy.