Aeromagnetic and tectonic analysis of the upper Mississippi Valley zinc-lead district
By: by Allen V. Heyl and Elizabeth R. King ; prepared in cooperation with the Wisconsin Geological and Natural History Survey.
Contributors: King, Elizabeth R.; Wisconsin Geological and Natural History Survey.
Series: Contributions to economic geology; Geological Survey bulletin -- 1242-A
Publisher: U.S. Govt. Print. Off.
Published: 1966
Place of publication: Washington
Language: eng
Number of pages: 16
Subjects: Geology, Economic -- Mississippi River Valley.; Magnetic anomalies -- Mississippi River Valley.; Geomagnetism -- Mississippi River Valley.; Mines and mineral resources -- Mississippi River Valley.; Ore deposits -- Mississippi River Valley.; Zinc ores -- Mississippi River Valley.; Lead ores -- Mississippi River Valley.; Rocks, Sedimentary -- Mississippi River Valley.
Notes: Includes one map on folded plate in pocket.

"A magnetic study indicating major geologic structures in the basement rock which controlled in part the locations of overlying ore deposits."

Includes bibliographical references (p. 15-16).