Helicopter electromagnetic and magnetic geophysical survey data, Oakland, Ashland, and Firth study areas, eastern Nebraska, March 2007

Online link http://pubs.usgs.gov/of/2008/1018/
Description Electrical resistivity depicted in georeferenced grids and maps, representing different approximate depths of investigation for each area. The range of subsurface investigation is comparable to the depth of shallow aquifers.
Originators Smith, Bruce D.; Abraham, Jared D.; Cannia, James C.; Steele, Gregory V.; and Hill, Patricia L.
Publication U.S. Geological Survey Open-File Report 2008-1018

States or counties