<?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>David L. Jones</dc:contributor>
  <dc:creator>Edgar H. Bailey</dc:creator>
  <dc:date>1973</dc:date>
  <dc:description>&lt;p&gt;A reexamination of reported blueschist mineral localities&amp;nbsp;in the basal strata of the Great Valley sequence revealed only&amp;nbsp;prehnite-pumpellyite facies minerals. Franciscan graywacke thrust&amp;nbsp;below the Great Valley rocks contains lawsonite-quartz blueschist&amp;nbsp;assemblages. At a common pressure of about 4 kb, the Franciscan&amp;nbsp;blueschists formed at lower temperatures than the overlying Great&amp;nbsp;Valley prehnite-bearing rocks, lending support to tectonic models that&amp;nbsp;involve rapid subduction of the Franciscan rocks.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Metamorphic facies indicated by vein minerals in basal beds of the Great Valley sequence, northern California</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>