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RE: More Than Meteor Killed the Dinos
> From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu]On Behalf Of
> The Deccan traps, I
> realize, are pretty well nailed down to have begun a million years before
> the Chicxulub strike, but "pretty well nailed down" isn't the same as
> "absotively posilootly nailed down," is it?
The lowermost Deccan basalts are apparently magnetic normal (presumably C30n,
although I suppose it might actually be C31n, which
would make them even older in the Late Maastrichtian...), while the K/T
boundary is during C29r (a magnetically-reversed interval).
So minimally the Deccan Traps began erupting a few hundreds of thousands of
years before the K/T boundary itself.
Thomas R. Holtz, Jr.
Senior Lecturer, Vertebrate Paleontology
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
Building 237, Room 1117
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796