<?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>Jesse W. Whitlow</dc:contributor>
  <dc:contributor>Percy Crosby</dc:contributor>
  <dc:creator>C. Erwin Brown</dc:creator>
  <dc:date>1957</dc:date>
  <dc:description>&lt;p&gt;A detailed geologic study was begun in 1951 by the U.S. Geological Survey in cooperation with the Iowa Geological Survey to appraise the potentialities of the Iowa part of the Wisconsin-Illinois-Iowa zinc-lead district for (1) zinc ore in rock strata that contain pitch-and-flat zinc ore bodies elsewhere in the mining district and (2) joint-controlled lead and zinc ore like that mined extensively during the 19th century in Dubuque County, Iowa.&amp;nbsp; This investigation is an outgrowth of a geologic study of the entire district, begun in 1942 by the U.S. Geological Survey.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/mf116</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Geology and zinc-lead deposits in the Catfish Creek area, Dubuque County, Iowa</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>