Geology of parts of the upper Mississippi Valley zinc-lead district.

Geology of parts of the upper Mississippi Valley zinc-lead district. - Washington, U.S. Govt. Print. Off. [1960-1966] - 571 p. illus., maps (part col.) 24 cm. - Bulletin no. 1123 . - Geological Survey bulletin ; 1123. .

Part of illustrative matter folded in pocket. Issued as separate chapters A-I.

Includes bibliographies.

gs 66000256 //r983


Geology--Mississippi River Valley.
Mines and mineral resources--Mississippi River Valley.
Lead ores--Mississippi River Valley.
Zinc ores--Mississippi River Valley.

QE75 / .B9 no. 1123

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