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Re: mass extinctions and DDT
>it's regarded as most parsimonious to consider the variations in glass
thickness as a function of the available manufacturing techniques, which
could not produce glass of consistent thickness, rather than in-situ changes
due to behaviour under gravitational stress over time.<
Blerg! My geology texts have lied to me then! Why was this information in
there, then, if its known that counterexamples exist?
Peace,
Rob
Student of Geology
Northern Arizona University
P.O. Box 20840
Flagstaff, Az. 86011
http://dinodomain.com
http://www.cafepress.com/robsdinos
"A _Coelophysis with feathers?"