<?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>W. S. Burbank</dc:contributor>
  <dc:creator>B. S. Butler</dc:creator>
  <dc:date>1929</dc:date>
  <dc:description>&lt;p&gt;The copper district of Keweenaw Point, in the northern peninsula of Michigan, is the second largest producer of copper in the world. &amp;nbsp;The output of the district since 1845 has been more than 7,500,000,000 pounds and showed a rather steady and consistent increase from the beginning of production to the end of the World War in 1918, since which there has been a marked decrease.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/pp144</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>The copper deposits of Michigan</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>