<?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>A. L. Dial Jr.</dc:creator>
  <dc:date>1984</dc:date>
  <dc:description>&lt;p&gt;&lt;span class="TextRun SCXW204306593 BCX8" lang="EN-US" xml:lang="EN-US" data-contrast="auto"&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;The Mare &lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;Boreum&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; geologic map portrays the north polar area of Mars above &lt;/span&gt;&lt;span class="SpellingError SCXW204306593 BCX8"&gt;lat&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; 65&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; N. &lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;T&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;he area contains &lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;five &lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;physiographic provinces: (1) a residual ice cap characterized by troughs with a &lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;counterclockwise outward spiral pattern (Mariner 9 frames DAS 13317550 and DAS 13353320&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;); (2) layered terrain adjacent to the ice cap, exposed within the spiral troughs; (3) a circumpolar band of low-albedo material extending roughly from &lt;/span&gt;&lt;span class="SpellingError SCXW204306593 BCX8"&gt;lat&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; 75&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; to 82&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; N; (4) isolated patches&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; of high-albedo perennial ice near &lt;/span&gt;&lt;span class="SpellingError SCXW204306593 BCX8"&gt;lat&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; 75&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; N&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;. within a &lt;/span&gt;&lt;span class="SpellingError SCXW204306593 BCX8"&gt;semicircumpolar&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; band between long 120&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; and 270&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;; and (5) circumpolar cratered plains of mottled albedo south of &lt;/span&gt;&lt;span class="SpellingError SCXW204306593 BCX8"&gt;lat&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt; 75&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;˚&lt;/span&gt;&lt;span class="NormalTextRun SCXW204306593 BCX8"&gt;.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/i1640</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>Geologic map of the Mare Boreum area of Mars</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>