RE: [OM] Photos of Turkey

[Garth Wood]

At 01:27 PM 3/18/2003 -0800, you wrote:
>As others have already intoned, amazing stuff.  What are Tufa layers? 


A type of limestone which forms exclusively underwater.  There's lots of tufa 
in the American Southwest (which was once mostly underwater in a vast inland 
sea) -- the Anasazi people used to burrow into cliff walls which were 
essentially tufa in order to create cliff-dwellings.

Garth


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