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<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>Lauren H. DeNinno</dc:contributor>
  <dc:contributor>L.V. Polyak</dc:contributor>
  <dc:contributor>Emma K. Caverly</dc:contributor>
  <dc:contributor>Richard Z. Poore</dc:contributor>
  <dc:contributor>Alec R. Brenner</dc:contributor>
  <dc:contributor>J. Rodriguez-Lazaro</dc:contributor>
  <dc:contributor>R.E. Marzen</dc:contributor>
  <dc:creator>Thomas M. Cronin</dc:creator>
  <dc:date>2014</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The stratigraphic distributions of ostracodes and selected calcareous benthic and planktic foraminiferal species were studied in sediment cores from ~&amp;nbsp;700 to 2700&amp;nbsp;m water depth on the Northwind, Mendeleev, and Lomonosov Ridges in the western Arctic Ocean. Microfaunal records in most cores cover mid- to late Quaternary sediments deposited in the last ~&amp;nbsp;600&amp;nbsp;ka, with one record covering the last ~&amp;nbsp;1.5&amp;nbsp;Ma. Results show a progressive faunal turnover during the mid-Pleistocene transition (MPT, ~&amp;nbsp;1.2 to 0.7&amp;nbsp;Ma) and around the mid-Brunhes event (MBE, ~&amp;nbsp;0.4&amp;nbsp;Ma) reflecting major changes in Arctic Ocean temperature, circulation and sea-ice cover. The observed MPT shift is characterized by the extinction of species that today inhabit the sea-ice free subpolar North Atlantic and/or seasonally sea-ice free Nordic Seas (&lt;/span&gt;&lt;i&gt;Echinocythereis&lt;/i&gt;&lt;span&gt;&amp;nbsp;sp.,&amp;nbsp;&lt;/span&gt;&lt;i&gt;Rockallia&lt;/i&gt;&lt;span&gt;cf.&amp;nbsp;&lt;/span&gt;&lt;i&gt;enigmatica&lt;/i&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;i&gt;Krithe&lt;/i&gt;&lt;span&gt;&amp;nbsp;cf.&amp;nbsp;&lt;/span&gt;&lt;i&gt;aquilonia&lt;/i&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;i&gt;Pterygocythereis vannieuwenhuisei&lt;/i&gt;&lt;span&gt;). After a very warm interglacial during marine isotope stage (MIS) 11 dominated by the temperate planktic foraminifer&amp;nbsp;&lt;/span&gt;&lt;i&gt;Turborotalita egelida&lt;/i&gt;&lt;span&gt;, the MBE experienced a shift to polar assemblages characteristic of predominantly perennial Arctic sea-ice cover during the interglacial and interstadial periods of the last 300&amp;nbsp;ka. These include the planktic foraminifera&amp;nbsp;&lt;/span&gt;&lt;i&gt;Neogloboquadrina pachyderma&lt;/i&gt;&lt;span&gt;, the sea-ice dwelling ostracode&lt;/span&gt;&lt;i&gt;Acetabulastoma arcticum&lt;/i&gt;&lt;span&gt;&amp;nbsp;and associated benthic taxa&amp;nbsp;&lt;/span&gt;&lt;i&gt;Pseudocythere caudata&lt;/i&gt;&lt;span&gt;,&lt;/span&gt;&lt;i&gt;Pedicythere neofluitans&lt;/i&gt;&lt;span&gt;, and&amp;nbsp;&lt;/span&gt;&lt;i&gt;Polycope&lt;/i&gt;&lt;span&gt;&amp;nbsp;spp. Several species can be used as biostratigraphic markers of specific intervals such as ostracodes&amp;nbsp;&lt;/span&gt;&lt;i&gt;Rabilimis mirabilis&lt;/i&gt;&lt;span&gt;&amp;nbsp;&amp;mdash; MIS 5 and&amp;nbsp;&lt;/span&gt;&lt;i&gt;P. vannieuwenhuisei&lt;/i&gt;&lt;span&gt;&amp;nbsp;extinction after MIS 11, and foraminiferal abundance zones&amp;nbsp;&lt;/span&gt;&lt;i&gt;Bulimina aculeata&lt;/i&gt;&lt;span&gt;&amp;nbsp;&amp;mdash; late MIS 5 and&amp;nbsp;&lt;/span&gt;&lt;i&gt;Bolivina arctica&lt;/i&gt;&lt;span&gt;&amp;nbsp;&amp;mdash; MIS 5-11.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/j.marmicro.2014.05.001</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Elsevier Scientific Pub. Co.</dc:publisher>
  <dc:title>Quaternary ostracode and foraminiferal biostratigraphy and paleoceanography in the western Arctic Ocean</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>