Do We Know What Killed the Dinosaurs? Feature Summary

Type:
From Physics Research
Title:
Do We Know What Killed the Dinosaurs?
Description:
In the image above (upper left) you can see two concentric circles. These mark the location of the Chicxulub crater, and the white line shows the coast of the Gulf of Mexico. See this Canadian site (scroll down to the third image) for a fuller explanation of how the image was made and for related images.

(This feature was updated on July 31, 2013.)

- The Chicxulub crater is a candidate for the asteroid impact that killed the dinosaurs, but not all scientists are convinced. Some believe the iridium layer (pictured at left) could also have been produced by volcanic eruptions at the same time as the layer was created.  

- For more about the Cretaceous extinction and the debate over what caused it, see these articles from the University of California Museum of Paleontology and the Geological Society of America.

(This feature was updated on July 13, 2012.)
Image:
image credit: A. Hildebrand, M. Pilkington, and M. Connors; <a href="http://miac.uqac.ca/MIAC/chicxulub.htm" target="_blank">image source</a>; <a href="http://www.physicstogo.org/images/features/cratergrav-large.jpg" target="_blank">larger image</a>
image credit: A. Hildebrand, M. Pilkington, and M. Connors; image source; larger image
Image URL:
http://www.compadre.org/Informal/images/features/cratergrav-large.jpg
Featured:
October 16, 2010 - November 1, 2010