RE: natural radioactivity

["Frame, Paul" <FrameP@orau.gov>]

> I haven't seen a map for general background radiation around 
> the US, but
> you can find a map for radon at 
> http://energy.cr.usgs.gov/radon/rnus.html.
 

Maps of gamma exposure rates, uranium, thorium and potassium concentrations
can be found at essentially the same site:

http://sedwww.cr.usgs.gov:8080/radon/DDS-9.html

Paul Frame
Professional Training Programs
ORAU
framep@orau.gov
http://www.orau.gov/ptp/ptp.htm
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