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> The 1993 Svarda paper was the one to which I was referring. And yes, it did upset A LOT of people on the catastrophist side of this debate. I bring it (and several other resent papers) up in discussions as often as I can because many of the neo-catastrophists among us simply refuse to cite, address (or even acknowledge the existence of) any data that contradicts their preferred explanation. Take a look as the K-T literature and I'm sure you'll see what I mean. I'm glad to see that you have been doing this because I try to expose the multiple lines of evidence to introductory geology students so they don't have their minds already made up for them later in life. Just what little I've read of the K-T literature has shown me that, unfortunately, the issue has become a little too polarized for some people. On the basis of what I've read so far, I'm persuaded that there was an impact but think that evidence for it was preserved (or not preserved) by the whims and vagaries of local environmental conditions, such as physical and biogenic reworking. Hence, when the evidence is not there, let's just say that's it not there and not try to make it into something else. > BTW, Thanks for your description of the outcrop debate in Poty Quarry. It sounded very reminiscent of a similar debate we had on the outcrop at Mimbral during the Snowbird III Field trip. You're welcome - I heard a little bit about the Snowbird field trip after I was in Recife and thought it sounded a little familiar to me, too. Were the ichnologists being the flies in the ointment there, too? Hopefully we won't get too much of a reputation as troublemakers. Anthony J. Martin Geosciences Program, Emory University Atlanta, Georgia USA -- /========/ LearnLink: Expanding Educational Horizons !! !! !! Internet/Telnet: bbs.learnlink.emory.edu !! !! !! For information, mail Info@learnlink.emory.edu /========/ "Minds are like parachutes, they must be open to function."
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