<?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>B. C. Hearn Jr.</dc:creator>
  <dc:date>1968</dc:date>
  <dc:description>Diatremes in the Missouri River Breaks demonstrate systematic subsidence-ring structure, contain inclusions derived from far above and far below, and have been produced by gas-rich eruptions of alkalic ultramafic magmas. Similar magmas have produced diatremes in many localities in the world and are known to be closely associated with and probably parental to kimberlites.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1126/science.159.3815.622</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Association for the Advancement of Science</dc:publisher>
  <dc:title>Diatremes with kimberlitic affinities in north-central Montana</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>