Extraterrestrial Cause for the Cretaceous-Tertiary Extinction
Author(s): Luis W. Alvarez, Walter Alvarez, Frank Asaro and Helen V. Michel
Source: Science, New Series, Vol. 208, No. 4448 (Jun. 6, 1980), pp. 1095-1108
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1683699 .
Accessed: 19/09/2013 15:50
Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at .
http://www.jstor.org/page/info/about/policies/terms.jsp
.
JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of
content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms
of scholarship. For more information about JSTOR, please contact support@jstor.org.
.
American Association for the Advancement of Science is collaborating with JSTOR to digitize, preserve and
extend access to Science.
http://www.jstor.org
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions
This content downloaded from 134.173.140.64 on Thu, 19 Sep 2013 15:50:52 PM
All use subject to JSTOR Terms and Conditions