<?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>Harold Masursky</dc:contributor>
  <dc:contributor>D. H. Scott</dc:contributor>
  <dc:creator>M. G. Chapman</dc:creator>
  <dc:date>1991</dc:date>
  <dc:description>&lt;p&gt;&lt;span class="TextRun SCXW189323018 BCX8" lang="EN-US" xml:lang="EN-US" data-contrast="auto"&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;This map is one in a series of 1:500,000-scale geologic maps initiated by the National Aeronautics and Space Administration to investigate areas of &lt;/span&gt;&lt;span class="AdvancedProofingIssue SCXW189323018 BCX8"&gt;particular scientific&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt; interest on Mars. The north Kasei Valles area (fig. 1) merits detailed geologic study because it c&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;ontains part of a large channel system whose age&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt; can be determined &lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;relative&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt; to geologic units that range &lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;in age from early intermediate (Early Hesperian) to the very late (Late Amazonian) periods of &lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;Martian&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt; history&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;. Also, many geomorphic features in the map area suggest changes in water level and multiple erosional events associated with the Kasei Valles system. Later erosional events are indicative of spring sapping&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;; small-scale, ground-water runoff; and water-mobilized debris flow. Therefore, this large-scale mapping has increased our understanding of the history of hydrolo&lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;gic processes on Mars (Chapman and Scott, 1989). For these reasons, part of the area is a candidate &lt;/span&gt;&lt;span class="NormalTextRun SCXW189323018 BCX8"&gt;site for a sample-return mission to the planet.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/i2107</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Geologic map of science study area 2, north Kasei Valles, Mars (MTM 25072 Quadrangle)</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>