Geology of the Upper Mississippi Valley Base-Metal District (3rd edition)

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Author Heyl, A.V.; Broughton, W.A.; West, W.S.;
Publication Year 1978
Series number IC16-1978
Resource Type Report
Physical Description 45 p.
Notes 3rd edition published in 1978. [See also: Upper Mississippi Valley Base-Metal District](
Geographic Area Grant, Green, Iowa, Lafayette
Tags Driftless Area, Metallic Minerals, Bedrock Geology, Rocks and Minerals
ISSN 0512-0640