Geology and zinc-lead deposits in the Couler Valley area, Dubuque County, Iowa

January 1, 1955

Geologic investigations were begun in the Iowa portion of the Wisconsin-Illinois-Iowa zinc-lead district to appraise its potentialities: (1) for zinc ore in strata that elsewhere in the mining district contain large zinc ore bodies and (2) for lead and zinc deposits of the type that were mined extensively in Dubuque County, Iowa, during the 19th century.

Publication Year	1955
Title	Geology and zinc-lead deposits in the Couler Valley area, Dubuque County, Iowa
DOI	10.3133/mf42
Authors	C. Erwin Brown, L.G. Collins, Percy Crosby
Publication Type	Report
Publication Subtype	USGS Numbered Series
Series Title	Miscellaneous Field Studies Map
Series Number	42
Index ID	mf42
Record Source	USGS Publications Warehouse

Geology and zinc-lead deposits in the Couler Valley area, Dubuque County, Iowa

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