For more images produced from this
data set, click here.
What is a CBA?
The CBA (Complete Bouguer Anomaly)
Data Downloads
Download the shapefile used to create the above images:
In Internet Explorer, right click and select "Save Target As...", then
choose where to save and click Save. "gravity_shapefile.zip", 3.78 MB
.zip file contains:
gravity_aznm_utmnad27.dbf
gravity_aznm_utmnad27.prj
gravity_aznm_utmnad27.shp
gravity_aznm_utmnad27.shx
*NOTE: If the .dbf file 'gravity_aznm_utmnad27.dbf" is viewed in MS Excel,
not all of the data points used to create the shapefile will display due
to Excel's size limitation of 65,536 records. Download individual files for
AZ and NM below if you want them all.
Download the .xls data files for Arizona and New Mexico. "gravity_xls_data.zip", 4.17 MB
.zip file contains: gravity_az.xls and gravity_nm.xls
Download the .dbf data files for Arizona and New Mexico. "gravity_dbf_data.zip", 1.90 MB
.zip file contains: gravity_az.dbf and gravity_nm.dbf
Metadata/Methodology:
Click here for more info on Metadata
and the methodology used to create the above images.
CBA data comes from PACES
Online Gravity Database
Latitude/Longitude box used:
N: 38 degrees (N)
S: 30 degrees (N)
E: -102 degrees (W)
W: -116 degrees (W)
Links
Read what the USGS has to say about gravity. FS-239-95 (65KB .pdf file):
Introduction to Potential Fields: Gravity
Arizona Geophysics 3D
These links have QuickTime VR movies of:
Residual Bouguer Anomaly Depth to Bedrock
(Produced by Stephen J Reynolds, Josh A Coyan, and Julia K Johnson)
An example (only a .jpg, not a movie):
