 Quote by Mr_Bojingles
I meant radon gas not radiation gas. What Im wondering is why Uranium deposits emit radon gas. The only thing I can think of is that its created by the decay of the Uranium.
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Radon is an intermediate step in the decay chains of several actinides.
U235 -
http://hyperphysics.phy-astr.gsu.edu...radser.html#c1
Th232 -
http://hyperphysics.phy-astr.gsu.edu...radser.html#c2
U238 -
http://hyperphysics.phy-astr.gsu.edu...radser.html#c3 (at two points)
Uranium is found at low levels in the Appalacian mountains, the western mountain states, and the northern/midwestern US.
http://www.epa.gov/iaq/radon/zonemap.html
Of course, it's higher in certain deposits which are mined for the very reason that the Uranium content makes it economical to mine.