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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

Watt Main

 

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Geophysics in Joshua Tree National Park

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above: Picture of Pleasant Valley, looking north with Malapai Hill in the backgroud

GRAVITY

Craig McCabe Helicopter

above left: Craig McCabe with gravity meter backpack. above right: Helicopter gravity in Pinto Basin

 

We use isostatic gravity data as a basis for modeling the shape of basins beneath Joshua Tree National Park to determine the location and geometry of faults within the area. See the following USGS publication for more details:

http://pubs.usgs.gov/of/2007/1218/

MAGNETICS

Collecting ground magnetic data
We collect ground magnetic data to locate and characterize faults in an area where highly magnetic basaltic rocks are in contact with less magnetic granitic rocks and basin sediments.

 

 

left: Nichole Knepprath collecting ground magnetic data in the eastern Pinto Basin

AMT (coming soon...)

Links:

Geology of Joshua Tree National Park and Vicinity
3D Photographic Tour of Park Geology

Geology and Geophysics || GUMP || USGS Geophysics Hub

 

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