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Re: extinction at the K/T boundary

>BTW, it was a comet, not an asteroid that did the damage at the

One of those infamous iron-nickel comets?  I think not.

To get an iridium spike, you need a metallic asteroid.

Thomas R. Holtz, Jr.
Vertebrate Paleontologist
Dept. of Geology
University of Maryland
College Park, MD  20742
Email:Thomas_R_HOLTZ@umail.umd.edu (th81)
Fax: 301-314-9661