Santa Cruz


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Density and Magnetic Properties of Selected Rock Samples from the Western U.S. and Alaska

Physical properties (density, magnetic susceptibility, and remanent magnetism) from 20,000 rock samples. Data are provided in CSV format.

Isostatic gravity map of the Monterey 30x60 minute quadrangle and adjacent areas, California

Gravity measurements to support regional mapping and hydrologic studies

Magnetotelluric Data from the San Andreas Fault, Loma Prieta CA, 1989-1990

Magnetotelluric data collected in 1989 and 1990 using USGS portable truck mounted systems that measure the distribution of electrical conductivity beneath the surface of the earth. This release provides digital information previously collected, recovered and reformatted for use with modern software. Data are provided in MT/EMAP formats.

Seven aeromagnetic surveys in California and Nevada

Grid and flight-line data files provided by the geophysical survey contractors.

Six aeromagnetic surveys in Nevada and California

Gridded data for aeromagnetic surveys with contractors' reports describing the data collection

Update of the Mineral Resources Data System for California including Mineral Deposit Types

Improved information on deposit model (type) in records of this older USGS database describing sites that are located in California. Includes a list of additional deposit types needed to properly categorize the California locations. Data are provided in Microsoft Excel, CSV, and Esri personal geodatabase (Microsoft Access) formats.