Geophysical
Layers Available for Download
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Geophysical
Layers Available for Download
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Data Disclaimer: It is fully the user’s responsibility to validate the accuracy and suitability of these data for a given application. The University of Nevada Reno, UCCSN, Great Basin Center for Geothermal Energy, Arthur Brant Laboratory for Exploration Geophysics, U. S. Department of Energy and other participating agencies, and their researchers and employees provide no warranty of any kind that the provided data and documentation products are free from error or complete.
| Go to Great Basin Center FTP download site |
Links to Description of sources and preparation of datasets
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Color Shaded Isostatic Residual Gravity Anomaly Reduced at 2.67 g/cc density. Data area is 1160 km by 1200 km. Data Source: New compilation with gridded 1000 m grid cells. Full resolution image (300 m pixels) TIFF image file (~ 50 MB) FGDC Metadata file
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Color Isostatic Residual Gravity Anomaly upward continued 10 km viewed on shaded topography. Data area is 1160 km by 1200 km. Data Source: New compilation gridded with 1000 m grid cells. isostatic residual gravity smoothed by upward continuation 10 km. Full resolution image (300 m pixels)
TIFF Image (~
50 MB)
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Color Shaded Complete Bouguer Gravity Anomaly Reduced at 2.67 g/cc density. Data area is 1160 km by 1200 km. Data Source: New compilation with gridded 1000 m grid cells. Full resolution image (300 m pixels) TIFF Image (~ 50 MB) FGDC Metadata File
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Color Shaded Free Air Gravity Anomaly. Data area is 1160 km by 1200 km. Data Source: New compilation gridded with 1000 m grid cells. Full resolution image (300 m pixels) Tiff Image (~ 50 MB) FGDC Metadata File |
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Digital Elevation Model color-shaded relief image showing Great Basin outline and county boundaries. Data area is 1160 km by 1200 km. Data Source: GTOPO30 prepared at 600 m grid cell size.
Full resolution image (300 m pixels) Tiff Image (~ 48 MB) FGDC Metadata File
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Figure 2. Shallow crustal residual gravity anomaly color-shaded-relief.
Data Source: New compilation with 1000 m grid cells. Residual produced by removing 20 km upward continuation of isostatic residual anomaly from isostatic residual anomaly. Full resolution image (300 m pixels) Tiff Image (~ 48 MB) FGDC Metadata File
Grid and contour files are also available.
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Figure 3. Sample detail of Residual gravity 1 milligal contours on 90m-resolution color shaded-relief DEM map area is 25 km by 25 km.
Line graphics: Gravity station locations and shallow crustal residual gravity contours (1 mgal interval) suitable for plotting on 1:250,000 scale maps.
Gravity Contour Shapefile
(~ 37
MB) zipped
Gravity Station Shapefile
(~ 11 MB) zipped |
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Figure 4. Shallow crustal residual gravity anomaly – grid displayed here as B&W intensity image.
Data Source: New compilation with 1000 m grid cells. Residual produced by removing 20 km upward continuation of isostatic residual anomaly from isostatic residual anomaly. Full resolution grid (1000 meter cells)
Tiff Image Format
(~ 5.3 MB)
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Figure 5. Magnetic total field intensity anomaly (IGRF corrected) reduced to 305 meters above ground.
Data source: USGS compiled aeromagnetic grid (1km cells) USGS, Kucks 2001.
Full resolution image (300 m pixels) Tiff Image File (~ 48 MB) FGDC Metadata File
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Below are a few other sources of geoscience layers that can be combined and viewed in ArcView-type programs without format conversions or re-projections.
The UNR Keck Earth Science data site offers projection and format compatible:
DDS-41 Great Basin Geoscience Database - shape files from the.
http://keck.library.unr.edu/data/gbgeosci/gbgdb.htm .
Topographic base maps (DRGs) 1:250,000 and 1:100,000 scales - ArcView compatible Tiff format
http://keck.library.unr.edu/data/drg/drgs.html .
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