999 resultados para Exploration mode
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"June 1956."
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"June 28, 1957."
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"Contract No. AT(30-1)-1377."
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"April 1953, [site issuance date]."
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"April 1953."
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Includes indexes.
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Cover title.
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Includes bibliographies.
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"Division of Raw Materials."
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Cover title.
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Mode of access: Internet.
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"Report no. FHWA-TS-80-202."
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Radiometric logging of the drill holes was accomplished by means of a Geiger counter-type probe. Samples for chemical assay were selected after checking the core with a Geiger counter and correlation with the radiometric logging record. The exploration project did not disclose significant amounts of ore-grade material although encouraging indications were found at two different properties.
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"August 1955."
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"DATE."