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Results for “Miscellaneous Field Studies Map”

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

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At least 1,117 records · Page 62Linked to original sources
USGS1983

Geophysical maps and interpretations of the Domeland Wilderness and contiguous Roadless Areas, Kern and Tulare counties, California

Geophysical maps were compiled and constructed from gravity and aeromagnetic surveys of the study area in order to assist the geologic mapping and the mineral resource assessment of the Domeland Wilderness and contiguous roadless areas. The isostatic residual gravity map (fig. 1) primarily reflects lateral density variations within the upper crust beneath the region studied. The aeromagnetic map reflects the distribution of magnetization in the underlying rocks. Because different rock types are often characterized by different densities and magnetic properties, the geophysical maps can be used to extend the geologic mapping into areas covered by surficial deposits and to help determine the subsurface locations and attitudes of contacts between rock units with contrasting properties.

California↗
USGS2001

Geologic map of the Silver Lake Quadrangle, Cowlitz County, Washington

This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Silver lake 7.5 minute quadrangle. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the spatial resolution (scale) of the database to 1:24,000 or smaller.

Miscellaneous Field Studies Map↗