USGS - science for a changing world

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

 

Geophysics Unit of Menlo Park, CA (GUMP)

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

Langenheim Main

Gravity Map of the Las Vegas Urban Corridor Region

 

 

 

las vegas gravity maps
 
Isostatic gravity map of the Las Vegas region. Warm colors indicate gravity highs; cool colors, gravity lows. Isostatic gravity anomalies reflect density variations in the upper to middle crust (for explanation of gravity and its application to geology, see the gravity section of the USGS Open-File Report 95-479).  We use the gravity map to "strip" off the sedimentary rocks that form the valley fill to look at the basement surface (defined to pre-Cenozoic in age because the rocks are denser than the valley fill).  Knowing the thickness of the valley fill is important for water studies and assessing earthquake hazards.  Large changes in the thickness may indicate where faults are buried beneath the valley fill.  The valley fill thickness can be an important factor in the amount of shaking produced by earthquakes both within and outside the valley.
 
 
vicki
 
 
Here is Vicki with the gravity meter with a view of Frenchman Mtn.
 

Geology and Geophysics || GUMP || USGS Geophysics Hub

 

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://geomaps.wr.usgs.gov/gump/people/zulanger/las_vegas_gravity.html
Page Contact Information: G & G Webmasters
Page Last Modified: 13-Dec-2016@16:38