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


Name Coolbaugh, Mark
Position missing
Organization Nevada Bureau of Mines and Geology
Name Dr. Gary L. Oppliger
Position missing
Organization University of Nevada, Mackay School of Mines

Geographic Extent

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