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GMEG - Geophysics Unit of Menlo Park, CA- (GUMP)


Geophysics Unit of Menlo Park, CA (GUMP)

U.S. Geological Survey - Western Region - Geology and Geophysics



Robert C. Jachens

Research Geophysicist
Geophysical Unit of Menlo Park, CA (GUMP)

U.S. Geological Survey
345 Middlefield Road, MS989
Menlo Park, CA 94025
phone: (650) 329-5300
fax: (650) 329-5133

Robert C. Jachens




B.S. - Geology - San Jose State University - 1962
M.S. - Geology - Columbia University - 1968
Ph.D. - Geology - Columbia University - 1972
Research Associate - Lamont-Doherty Geological Observatory - 1972-1976



Primary interest is in the application of gravity and magnetic techniques to the solution of geologic problems. Work has included studies of tidal gravity, temporal gravity changes associated with tectonic and volcanic deformation, earth fissuring due to groundwater extraction, regional geophysics in mineral resource assessments, plate tectonics of western North America, continent-scale relationships between gravity and upper-crustal geology, and the tectonic evolution of the California Coast Ranges. Most recent work has focussed on the use of regional gravity and magnetic anomalies to understand the structure of and offsets on faults of the San Andreas system.



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