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

Geologic investigations were begun in Iowa to appraise; (1) the possible occurrence of zinc ore in strata that elsewhere in the Upper Mississippi Valley zinc-lead district have been the principal sites of zinc concentration; and (2) lead ore of the type known as "crevice deposits," which were mined so extensively during the 19th century in Dubuque County, Iowa, but have been mined very...

Geology of anthracite in the eastern part of the Shenandoah quadrangle, Pennsylvania Geology of anthracite in the eastern part of the Shenandoah quadrangle, Pennsylvania

No abstract available.

Geology of anthracite in the western part of the Delano quadrangle, Pennsylvania Geology of anthracite in the western part of the Delano quadrangle, Pennsylvania

No abstract available.

Geology of anthracite in the western part of the Shenandoah quadrangle, Pennsylvania Geology of anthracite in the western part of the Shenandoah quadrangle, Pennsylvania

No abstract available.

Geology of the Marys Peak and Alsea quadrangles, Oregon Geology of the Marys Peak and Alsea quadrangles, Oregon

No abstract available.

Geology of the northern part of the Girard coal field, Richland County, Montana Geology of the northern part of the Girard coal field, Richland County, Montana

No abstract available.

Geology of the Sheridan and McMinnville quadrangles, Oregon Geology of the Sheridan and McMinnville quadrangles, Oregon

No abstract available.

Geology of the Shotgun Butte area, Fremont County, Wyoming Geology of the Shotgun Butte area, Fremont County, Wyoming

No abstract available.

Hamm Canyon quadrangle, Colorado Hamm Canyon quadrangle, Colorado

No abstract available.

Map of New Mexico showing test wells for oil and gas, oil and gas fields, and pipelines Map of New Mexico showing test wells for oil and gas, oil and gas fields, and pipelines

No abstract available.

Map of Wyoming showing test wells for oil and gas, anticlines, oil and gas fields, and pipelines Map of Wyoming showing test wells for oil and gas, anticlines, oil and gas fields, and pipelines

No abstract available.

Map showing distribution and occurrences of uranium deposits in part of the Edgemont mining district, Fall River County, South Dakota Map showing distribution and occurrences of uranium deposits in part of the Edgemont mining district, Fall River County, South Dakota

No abstract available.
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