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Results for “Geophysics”

Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

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USGS1984

Report on mineral resources geophysics program for Egypt

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Open-File Report↗

USGS1984

Preliminary geological, geophysical, and biological data from the Gorda Ridge

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Open-File Report↗

USGS1984

Bibliography of U.S. Geological Survey reports on coal drilling and geophysical logging projects, and related reports on geologic uses, Powder River Basin, Montana and Wyoming, 1973-1983

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Open-File Report↗

USGS1984

Geological and geophysical evidence of structures in northwest-trending washes, Yucca Mountain, southern Nevada, and their possible significance to a nuclear waste repository in the unsaturated zone

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Open-File Report↗

USGS1984

Compilation of selected geophysical references for the Snake River plain, Idaho and eastern Oregon

This report is one in a series resulting from the U.S. Geological Survey's Snake River Plain RASA (Regional Aquifer System Analysis) study that began in October 1979.

Idaho, Oregon↗

USGS1984

Descriptive, geologic, and borehole geophysical logs for 23 test holes in south-central Nebraska

This report presents logs for 23 test holes drilled in eight counties in south-central Nebraska as part of a study of the hydrogeology of the area. Five logs are presented for each of the test holes. The first is a written description summarizing the sediments penetrated during drilling; the second is a geological log providing a diagrammatic representation of the stratigraphic units; the remaining three show spontaneous potential, single-point resistance, and natural-gamma radiation measured in the test holes. The test holes penetrate silts, sands, and gravels of Quaternary age, and siltstones, sandstones , and silts of the Ogallala Formation of Tertiary age. Each test hole was drilled deep enough to penetrate about 20 feet of the underlying Cretaceous-age bedrock. (USGS)

Open-File Report↗

USGS1984