<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Darryl E. Granger</dc:contributor>
  <dc:contributor>Steven C. Wallace</dc:contributor>
  <dc:creator>William E. Odom</dc:creator>
  <dc:date>2025</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;We provide 2 independent radioisotopic age estimates for cored basal sediments of the Gray Fossil Site using cosmogenic nuclides. The first estimate uses meteoric&amp;nbsp;&lt;/span&gt;&lt;sup&gt;10&lt;/sup&gt;&lt;span&gt;Be/&lt;/span&gt;&lt;sup&gt;9&lt;/sup&gt;&lt;span&gt;Be from the bottom of the GFS-1 core, as well as from modern local grasses, to constrain the deposition of basal GFS sinkhole complex sediments to 6.60 ± 0.85 Ma. We corroborated this age estimate using&amp;nbsp;&lt;/span&gt;&lt;i&gt;in-situ&lt;/i&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;sup&gt;10&lt;/sup&gt;&lt;span&gt;Be and&amp;nbsp;&lt;/span&gt;&lt;sup&gt;26&lt;/sup&gt;&lt;span&gt;Al in quartz sands from the GFS-1 core. This estimate provided a looser constraint than the&amp;nbsp;&lt;/span&gt;&lt;sup&gt;10&lt;/sup&gt;&lt;span&gt;Be&lt;/span&gt;&lt;sub&gt;met&lt;/sub&gt;&lt;span&gt;/&lt;/span&gt;&lt;sup&gt;9&lt;/sup&gt;&lt;span&gt;Be approach, yielding a minimum burial age for the basal sediments of 4.43 ± 0.34 Ma. These independent geochronometers provide evidence that the deepest GFS sediments are at least early Pliocene in age, and likely date to the late Miocene.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:language>en</dc:language>
  <dc:publisher>Eagle Hill Institute</dc:publisher>
  <dc:title>10Be/9Be and 26Al/10Be support a late Miocene burial age for basal Gray Fossil Site sediments</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>