Kansas Digital Petroleum Atlas Residual Bouguer Gravity of Kansas--1117 by 651 pixels For additional information, please visit the Gravity and Magnetics of Kansas page for larger scale images and maps to download.

Small gravity maps with overlays of...
County Lines Only || Oil and Gas Fields || Post-Mississippian Structure || Regional Precambrian Structure || Top of the Precambrian
Large gravity maps with overlays of..
County Lines Only || Oil and Gas Fields || Post-Mississippian Structure || Regional Precambrian Structure || Top of the Precambrian

62,606 gravity-station measurements were taken by the KGS. In eastern Kansas, the original data are spaced approximately 1 mile east-west by 1 mile north-south. In western Kansas, the data are spaced 2 miles apart north-south and 1 mile east-west. The data were corrected for tidal changes and machine drift using base stations and software written at the KGS. Topographic maps were used for location and elevation information.

After reduction to Bouguer anomoly values, the data were gridded with a two-pass, 8-directional gridding algorithm. A second-order polynomial surface was calculated to remove a regional westward decrease in gravity values caused in part by thickening of the crust. The resulting second-order residual grid, previously used in several KGS open-file reports, was brought into ER Mapper software for analysis.

These colored images are displayed with apparent relief created by vertical illumination. Blues represent lowest residual Bouguer gravity values; reds represent highest residual Bouguer gravity values. Steeper gradients are indicated by darker shading.

You may also wish to visit the Gravity and Magnetics of Kansas page for larger scale images and maps to download.