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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>Jeffrey S. Pigati</dc:contributor>
  <dc:contributor>Kathleen B. Springer</dc:contributor>
  <dc:contributor>Stephanie Bosch</dc:contributor>
  <dc:contributor>Jeffrey C. Nekola</dc:contributor>
  <dc:contributor>Yurena Yanes</dc:contributor>
  <dc:creator>Jason A. Rech</dc:creator>
  <dc:date>2021</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Recent studies have shown the oxygen isotopic composition (δ&lt;/span&gt;&lt;span class="sup"&gt;18&lt;/span&gt;&lt;span&gt;O) of modern terrestrial gastropod shells is determined largely by the δ&lt;/span&gt;&lt;span class="sup"&gt;18&lt;/span&gt;&lt;span&gt;O of precipitation. This implies that fossil shells could be used to reconstruct the δ&lt;/span&gt;&lt;span class="sup"&gt;18&lt;/span&gt;&lt;span&gt;O of paleo-precipitation as long as the isotopic system, including the hydrologic pathways of the local watershed and the gastropod systematics, is well understood. In this study, we measured the δ&lt;/span&gt;&lt;span class="sup"&gt;18&lt;/span&gt;&lt;span&gt;O values of 456 individual gastropod shells collected from paleowetland deposits in the San Pedro Valley, Arizona that range in age from ca. 29.1 to 9.8 ka. Isotopic differences of up to 2‰ were identified among the four taxa analyzed (Succineidae,&amp;nbsp;&lt;/span&gt;&lt;span class="italic"&gt;Pupilla hebes&lt;/span&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span class="italic"&gt;Gastrocopta tappaniana&lt;/span&gt;&lt;span&gt;, and&amp;nbsp;&lt;/span&gt;&lt;span class="italic"&gt;Vallonia gracilicosta&lt;/span&gt;&lt;span&gt;), with Succineidae shells yielding the highest values and&amp;nbsp;&lt;/span&gt;&lt;span class="italic"&gt;V&lt;/span&gt;&lt;span&gt;.&amp;nbsp;&lt;/span&gt;&lt;span class="italic"&gt;gracilicosta&lt;/span&gt;&lt;span&gt;&amp;nbsp;shells exhibiting the lowest values. We used these data to construct a composite isotopic record that incorporates these taxonomic offsets, and found shell δ&lt;/span&gt;&lt;span class="sup"&gt;18&lt;/span&gt;&lt;span&gt;O values increased by ~4‰ between the last glacial maximum and early Holocene, which is similar to the magnitude, direction, and rate of isotopic change recorded by speleothems in the region. These results suggest the terrestrial gastropods analyzed here may be used as a proxy for past climate in a manner that is complementary to speleothems, but potentially with much greater spatial coverage.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1017/qua.2021.18</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Cambridge University Press</dc:publisher>
  <dc:title>Oxygen isotopes in terrestrial gastropod shells track Quaternary climate change in the American Southwest</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>