<?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:creator>R.J. Dunham</dc:creator>
  <dc:date>1955</dc:date>
  <dc:description>&lt;p&gt;Carnotite, sabugalite [HAI(UO&lt;sub&gt;2&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;(PO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;&amp;nbsp;&amp;bull; 16H&lt;sub&gt;2&lt;/sub&gt;O]&amp;nbsp;and autunite&amp;nbsp;occur in the basal 25 feet of a 270-foot sequence of nonmarine bedded gypsum&amp;nbsp;and gypsiferous clay in the Brule formation of Oligocene age about 12&amp;nbsp;miles northeast of Chadron in northeastern Dawes County, Nebraska.&amp;nbsp;Uranium minerals are visible at only two localities and are associated&amp;nbsp;with carbonaceous matter. Elsewhere the basal 25 feet of the gypsum sequence&amp;nbsp;is interbedded with carbonate rocks and is weakly but persistently&amp;nbsp;uraniferous. Uranium probably was emplaced from above by uranyl solutions&amp;nbsp;rich in sulfate.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/tei525</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Uranium minerals in Oligocene gypsum near Chadron, Dawes County, Nebraska</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>