[Clayart] tony's metaphor tangent - cornwall stone vs custer, mega-pinholes

ivor and olive lewis iandol at westnet.com.au
Fri Mar 7 23:38:17 EST 2014

Potash Felspar and Sodium Felspar have differing thermal histories, the 
former undergoing a Peritectic transformation in the region of 1150 Deg C. 
Soda felspar becomes molten at a higher temperature.
Ivor Lewis,
South Australia 

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