Quote:
Originally Posted by trinitree88
Fiery Phoenix. The controversey over the K/T boundary arose over the anomalous levels of iridium in the soil samples. Iridium is fairly rare in comets but far more common in asteroids prompting Luis Alvarez to suggest an asteroid impact. As the layers were worldwide and thickened towards Central America...that became the smoking gun. Oil prospectors recalled seismic evidence for a crater off the coast of Oaxaca, and it fit pretty well, prompting well deserved fame for Luis. pete
see: http://en.wikipedia.org/wiki/Chicxulub_crater |
Thanks for the correction.
I do remember reading that it was a comet, though, because an asteroid is not strong enough to cause such a great event. But with the information you provided, I take that back.
