On Tuesday, March 18, 2003, at 01:35 PM, Garth Wood wrote:
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
All the cliff dwellings I have seen are in sandstone. Not tufa which is
calcium carbonate.
Site with pictures and explanation of tufa towers at Mono Lake:
http://www.quovadimus.org/sierra97/mono/thumb.html
Winsor Crosby
Long Beach, California, USA
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