Comment on "Apatite 4He/3He and (U-Th)/He evidence for an ancient Grand Canyon".
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- Record sourced from PubMed, PMID 23580512.
- Also identified by DOI 10.1126/science.1234567.
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Abstract
Flowers and Farley (Reports, 21 December 2012, p. 1616; published online 29 November 2012) use thermochronometry to propose that the western paleo-Grand Canyon was nearly as deep 70 million years ago (Ma) as today. However, lithologies, facies relations, geomorphology, and paleotopography of Miocene interior-basin deposits near the mouth of the Grand Canyon show that no paleocanyon existed in that area during filling of the basin, ~17 to ~5 Ma.