<?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>J. E. Guest</dc:contributor>
  <dc:creator>Ronald Greeley</dc:creator>
  <dc:date>1987</dc:date>
  <dc:description>&lt;p&gt;&lt;span class="TextRun SCXW232260612 BCX8" lang="EN-US" xml:lang="EN-US" data-contrast="auto"&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;The &lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;M&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;ariner 9 mission &lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;in&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt; the early 1970’s provided the first comprehensive view of the geology of Mars (McCauley and &lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;others, 1972, &lt;/span&gt;&lt;span class="SpellingError SCXW232260612 BCX8"&gt;Masursky&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;, 1973) and led&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt; to the derivation of the first global &lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;geologic&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt; map (&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;Carr&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt; and others, 19&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;73). These preliminary studies&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt; were followed by more comprehensive mapping coordinated with the U.S. Geological Survey. Thirty quadrangles at a scale of 1:5&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;,&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;0&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;00,000 were produced in this map series, from which Scott and &lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;Carr&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt; (1978) compiled a single geologic map at a scale of 1:25,000,000. &lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;The reliability of these maps, however, is varied because of the &lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt;uneven&lt;/span&gt;&lt;span class="NormalTextRun SCXW232260612 BCX8"&gt; quality of the Mariner 9 data.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/i1802B</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Geologic map of the eastern equatorial region of Mars</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>