Yours, Dora Smith Austin, TX tiggernut24@yahoo.com
<<I'd wager that it takes more than just a single event (probably even more
than two coincidental events) to cause a mass extinction.
There's a heck of a difference between that, and concluding it was two
events what probably did it, Dann. As you point out several other
possibilities, I doubt that first sentence is exactly controversial. Doing
something as mundane as bunging in a landbridge between North and South
America, for example, could have interesting effects on sea flows. And you
don't need a weatherman to know that affects how the wind blows... (With
thanks to Bob Dylan.)
-- ___________________________________________________________________
Dann Pigdon GIS / Archaeologist http://heretichides.soffiles.com Melbourne, Australia http://www.geocities.com/dannsdinosaurs
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