Kansas Digital Petroleum Atlas Magnetic Map of Kansas For additional information, please visit the Gravity and Magnetics of Kansas page for larger scale images and maps to download.

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

The images for the large maps are 237k-292k, and will take some time to download.

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Contour interval 100 ft., sea level datum.
Contours = white, faults = red.
See either of the Regional Precambrian Structure maps for regional contour values every 1000 ft.

Overlay based on
Cole, V.B., 1976, Configuration of the top of Precambrian rocks in Kansas: Kansas Geological Survey, Map M-7, scale 1:500,000.

Approximately 45,000 line-miles of digitally recorded aeromagnetic data were acquired at 1/4-mile intervals along east-west flight lines spaced 2 miles apart across Kansas. North-south tie lines were flown approximately 20 miles apart. The data were leveled using the tie lines and a least-squares algorithm. Three elevations were used in flying over Kansas. One jump occurs in the middle of the state and shows up as a north-south artifact in the maps. The other elevation change, in western Kansas, is less apparent.

The grid was reduced to the pole using inclination of 65 degrees and declination of 7 degrees. Reduction to the pole was performed to improve the resolution and shape of anomalies. In addition, this process roughly centers anomalies over their causative bodies. Grids used in published and open-file KGS maps were brought into ER Mapper software to create these images.

These colored images are displayed with apparent relief created by vertical illumination. Blues represent lowest magnetic values; reds represent highest magnetic 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.