More Than Meteor Killed The Dinos

["Richard W. Travsky" <rtravsky@uwyo.edu>]

http://www.sciencedaily.com/releases/2006/10/061023192530.htm

There's growing evidence that the dinosaurs and most their contemporaries 
were not wiped out by the famed Chicxulub meteor impact, according to a 
paleontologist who says multiple meteor impacts, massive volcanism in 
India, and climate changes culminated in the end of the Cretaceous Period.

The Chicxulub impact may, in fact, have been the lesser and earlier of a 
series of meteors and volcanic eruptions that pounded life on Earth for 
more than 500,000 years, say Princeton University paleontologist Gerta 
Keller and her collaborators Thierry Adatte from the University of 
Neuchatel, Switzerland, and Zsolt Berner and Doris Stueben from Karlsruhe 
University in Germany. A final, much larger and still unidentified impact 
65.5 million years ago appears to have been the last straw, exterminating 
two thirds of all species in one of the largest mass extinction events in 
the history of life. It's that impact -- not Chicxulub -- which left the 
famous extraterrestrial iridium layer found in rocks worldwide that marks 
the impact that finally ended the Age of Reptiles.
...

(more at link)