Author Search Results

Stratigraphy and petrology of the Tascotal Mesa quadrangle, Texas

by Erickson, Ralph Leroy, 1923-
Published: Bureau of Economic Geology, University of Texas, 1953

Description: 1353-1386 pages : illustrations ; 25 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of gold and silver, Brooks Spring quadrangle, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1974

Description: 2 maps on 1 sheet ; 49 x 37 cm, on sheet 58 x 89 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of copper and molybdenum, Brooks Spring quadrangle, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1974

Description: 2 maps on 1 sheet ; 49 x 37 cm on sheet 58 x 89 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of mercury and lead, Brooks Spring quadrangle, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1974

Description: 2 maps on 1 sheet ; 49 x 37 cm on sheet 58 x 89 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of tungsten and bismuth, Brooks Spring quadrangle, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1974

Description: 2 maps on 1 sheet ; 49 x 37 cm on sheet 59 x 92 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of mercury and arsenic, Golconda and Iron Point quadrangles, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1971

Description: 2 maps ; 49 x 74 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of antimony and tungsten, Golconda and Iron Point quadrangles, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1971

Description: 2 maps ; 49 x 74 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of gold and copper, Golconda and Iron Point quadrangles, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1971

Description: 2 maps ; 49 x 74 cm.

Map

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of lead and silver, Golconda and Iron Point quadrangles, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1971

Description: 2 maps ; 49 x 74 cm.

Map

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of molybdenum and zinc, Golconda and Iron Point quadrangles, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1972

Description: 2 maps ; 49 x 74 cm.

Map

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of antimony and arsenic, Brooks Spring quadrangle, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1974

Description: 2 maps on 1 sheet ; 49 x 37 cm on sheet 58 x 89 cm.

Map

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of lead, silver, gold, and copper, Goldrun Creek quadrangle, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1973

Description: 4 maps on 2 sheets ; 49 x 38 cm, on sheets 58 x 92 cm, folded in enveleope 25 x 32 cm.

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Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of mercury, arsenic, antimony, and tungsten, Golrun Creek quadrangle, Humboldt County, N...

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1973

Description: 4 maps on 2 sheets ; 49 x 38 cm on sheets 58 x 92 cm.

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Map of bedrock geology of Magnet Cove igneous area, Hot Springs County, Arkansas

by Erickson, Ralph Leroy, 1923-
Published: Dept. of the Interior, United States Geological Survey, 1956

Description: 1 map ; 72 x 111 cm.

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Generalized geologic and summary geochemical maps of the Rolla 1⁰ x 2⁰ quadrangle, Missouri

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1978

Description: 2 maps ; 44 x 71 cm each on 1 sheet 104 x 120 cm folded in envelope 31 x 25 cm.

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Geochemistry and petrology of the alkalic igneous complex at Magnet Cove, Arkansas

by Erickson, Ralph Leroy, 1923-
Published: U.S. Govt. Print. Off., 1963

Description: v, 95 pages : 3 folded maps (in pocket, 1 color) diagrams, tables. ; 29 cm.

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Gold geochemical anomaly in the Cortez district, Nevada

by Erickson, Ralph Leroy, 1923-
Published: [publisher not identified], 1966

Description: 2 pages : illustrations, maps. ; 27 cm.

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Summary geochemical maps of the Harrison 1⁰?x 2⁰?quadrangle, Arkansas and Missouri

by Erickson, Ralph Leroy, 1923-
Published: U.S. Geological Survey, 1989

Description: 18 maps on 3 sheets : color ; 44 x 72 cm and 22 x 86 cm, sheets 127 x 86 cm and smaller, folded in envelope 30 x 24 cm + 1 pamphlet (57 pages : graphs ; 28 cm).

Map

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Geochemistry and petrology of the alkalic igneous complex at Magnet Cove, Arkansas

by Erickson, Ralph Leroy, 1923-
Published: United States Department of the Interior, Geological Survey, 1963

Description: 1 online resource (v, 95 pages) : illustrations + 3 plates.

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Geochemical exploration near the Getchell mine, Humboldt County, Nevada

by Erickson, Ralph Leroy, 1923-
Published: United States Department of the Interior, Geological Survey, 1964

Description: 1 online resource (26 pages, 2 pages of plates) : illustrations, maps, charts.

eBook

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