Friday, July 30, 2010

Re: [Geology2] The Irrational Fear Of Our State Rock

But there was a tizzy probably about a year ago about the radioactivity in granite.  Some were advocating banning all granite.  It is related to their point, yes, but I am trying to calm any overreaction caused by their comments.


--- On Fri, 7/30/10, Kim Noyes <> wrote:

From: Kim Noyes <>
Subject: Re: [Geology2] The Irrational Fear Of Our State Rock
Date: Friday, July 30, 2010, 12:48 AM


Isn't your point their point?

Yes, there is uranium in the granite by way of demonstrating that other state rocks have potential/theoretic al hazards but those people are not in a tizzy about that fact because the risks are comparatively low just as we Californians ought not to be upset about Serpentine?


On Thu, Jul 29, 2010 at 10:10 AM, Diorite Gabbro <diorite@yahoo. com> wrote:

I appreciate this op-ed piece, but I do have one nit to pick.

--- On Wed, 7/28/10, Kim Noyes <kimnoyes@gmail. com> Quoted:

>Or the New Hampshire and
North Carolina state rock, granite, which contains radioactive uranium.

Yes, uranium can be found in granites.  Some granites have concentrations high enough to make it a bad idea to use it for granite countertops.  Before installing true granite, you should check with the dealer to be sure it has been tested for safety.

But, the concentration of uranium is most granites is so low that you are not at risk from exposure.  You get far more radiation from other sources in your everyday life.


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