Re: Cranham Stone Quarries

In article <VA.00000b65.3d0ccc3c@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, Aidan Karley <doIlookDAFTenoughTOpost@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> writes 
In article <JBlnf.7530$iz3.3428@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Malc
wrote:

Ooh look I just found this.

http://www.cranham.net/history/cranhamcaves.htm

      Well done. Keep digging.
      You'll note that the description of the properties of the stone
is decidedly similar to the description of Portland Stone and Bath
Stone. The description of it being easier to work while it's still
underground is common.

When I was researching Box, I was told it's a chemical reaction - that these oolitic limestones harden significantly in the air above ground. I'm not sure if it's the absence of groundwater, increased levels of oxygen (circulating around the stone surfaces) or what. I couldn't find an equation.

Do you know if this is true and, if so, can you point me to the chemistry please?


Regards,

Simonm.

--
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