<?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>S. Byrne</dc:contributor>
  <dc:contributor>P.S. Russell</dc:contributor>
  <dc:contributor>K.E. Fishbaugh</dc:contributor>
  <dc:contributor>A. S. McEwen</dc:contributor>
  <dc:creator>Kenneth E. Herkenhoff</dc:creator>
  <dc:date>2007</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Mars' north pole is covered by a dome of layered ice deposits. Detailed (∼30 centimeters per pixel) images of this region were obtained with the High-Resolution Imaging Science Experiment on board the Mars Reconnaissance Orbiter (MRO). Planum Boreum basal unit scarps reveal cross-bedding and show evidence for recent mass wasting, flow, and debris accumulation. The north polar layers themselves are as thin as 10 centimeters but appear to be covered by a dusty veneer in places, which may obscure thinner layers. Repetition of particular layer types implies that quasi-periodic climate changes influenced the stratigraphic sequence in the polar layered deposits, informing models for recent climate variations on Mars.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1126/science.1143544</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Association for the Advancement of Science (AAAS)</dc:publisher>
  <dc:title>Meter-scale morphology of the north polar region of mars</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>