KML Geology - Using Google in Geology  
San Diego State University - Department of Geological Sciences

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USGS Terrestrial Gamma Radioactivity for the Continental US Geology
USGS Terrestrial Gamma Radioactivity for the Continental US Map

KML Page
KML Page

Aerial gamma-ray data used to quantify and describe the radioactivity of rocks and soils. This google overlay illustrates the terrestrial Gamma radiation levels across the continental US.
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