K/T Boundary?

[sean.kerns@sdrc.com (Snake)]

Forwarded message:
> 
> but, i remember hearing the statistic that ~75% of species became extinct
> at the K/T boundary.  how can you say that this did not affect most food
> webs?  or do i have the numbers wrong?
> bonn

I know this is a really fundamental question, but remember, I'm new
to paleontology: What do the "K" and "T" stand for? Every book I
have uses the phrase "K/T boundary" merrily, but none of them 
define it. I hhave inferred that it occurred at the end of the
Cretaceous, and in that context, "T" could be "Tertiary", but
what is "K"? "Mesozoic" doesn't start with "K", nor does 
"Cretaceous"... If someone could define that for me, I'd really
appreciate it; it's been driving me nuts.
Thanks.
Sean
> 


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|    Sean R. "Snake" Kerns              e-mail: sean.kerns@sdrc.com |  
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