<?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>Cynthia J. Rowland</dc:contributor>
  <dc:creator>B. Craig McManus</dc:creator>
  <dc:date>1993</dc:date>
  <dc:description>&lt;p&gt;The mapped area in underlain by layered sedimentary rocks chiefly consisting of shale, mudstone, siltstone, and argillite and by a diabase sheet thtat has intruded the sedimentary rocks. &amp;nbsp;The sedimentary rocks adjacent to the diabase are thermally altered to hornfels. &amp;nbsp;Water levels in shallow wells completed in the diabase indicate the presence of an upper, shallow aquifer system. &amp;nbsp;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/wri924194</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Altitude and configuration of the potentiometric surfaces of the upper and lower aquifer systems in Bridgeton, Nockamixon, and Tinicum Townships, Bucks County, Pennsylvania, April 1991 through April 1992</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>