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Response to Comments on “Apatite ^4He/^3He and (U-Th)/He Evidence for an Ancient Grand Canyon”

Flowers, R. M. and Farley, K. A. (2013) Response to Comments on “Apatite ^4He/^3He and (U-Th)/He Evidence for an Ancient Grand Canyon”. Science, 340 (6129). pp. 143-144. ISSN 0036-8075.

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We reiterate that geological observations do not require Grand Canyon carving coeval with Colorado River integration. (U-Th)/He data from the western canyon, totaling 29 reproducible analyses from six samples and two labs, compellingly support an ancient canyon. Three dispersed analyses from one anomalous sample do not refute this conclusion, nor do the claimed shortcomings of our modeling have validity.

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Farley, K. A.0000-0002-7846-7546
Additional Information:© 2013 American Association for the Advancement of Science. Received for publication 22 January 2013. Accepted for publication 25 February 2013. This work was supported by NSF grant EAR-1019896 to K.A.F.
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Issue or Number:6129
Record Number:CaltechAUTHORS:20130516-102216881
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Official Citation:Response to Comments on “Apatite 4He/3He and (U-Th)/He Evidence for an Ancient Grand Canyon” R. M. Flowers and K. A. Farley Science 12 April 2013: 340 (6129), 143. [DOI:10.1126/science.1234203]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38538
Deposited By: Tony Diaz
Deposited On:03 Jun 2013 19:25
Last Modified:03 Mar 2020 13:01

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