Combined Gravity and DEM Gradient Evidence of the Great Basin

Combined Gravity/Topographic Map of the Great Basin, Nevada. Provided by the Nevada Nureau of Mines and Geology by Mark Coolbaugh and Gary Oppliger. This ESRI real number GRID represents a combined gravity and topographic gradient map. As a proxy for measuring the effective vertical displacement on late Tertiary and Quaternary faults in the Great Basin, a residual gravity map was combined with a topographic digital elevation model (DEM), and then the total surface slope (horizontal gradient) was calculated. The residual gravity map was further reduced by removing bedrock-only regional gravity trends to produce a basins-only gravity anomaly map. This gravity map was converted to an approximate equivalent amount of subsurface basement relief using 60 meters/mgal (equivalent to a density contrast of 0.4 g/cm3), and then added to the 1-km DEM. The combined bedrock surface slope was then calculated by computing the total horizontal gradient for each 1-km cell.

Data and Resources

Metadata Source

Additional Info

Field Value
Citation Date 2005-05-05T00:00:00

Harvest Information

Original ID 50ec3aefb656b70647f32e38bc2fd0e1
Index Date 2014-10-10T18:36:24Z
Original Format ISO-USGIN
Original Version 1.2

Authors

Name Coolbaugh, Mark
Position missing
Organization Nevada Bureau of Mines and Geology
Email nbmg@unr.edu
Name Dr. Gary L. Oppliger
Position missing
Organization University of Nevada, Mackay School of Mines
Email oppliger@mines.unr.edu

Geographic Extent

North Bound 44.31145
South Bound 33.115972
East Bound -111.489634
West Bound -121.76298