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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>Bruce R. Wardlaw</dc:contributor>
  <dc:contributor>Merlynd K. Nestell</dc:contributor>
  <dc:creator>Darwin R. Boardman II</dc:creator>
  <dc:date>2009</dc:date>
  <dc:description>&lt;p&gt;&lt;b&gt;Part A&lt;/b&gt; The uppermost Wabaunsee, Admire, Council Grove, and lower Chase Groups of Kansas, Oklahoma, and Nebraska are placed into three third-order depositional sequences: a Gzhelian late-highstand sequence set, a Council Grove transgressive and highstand sequence set, and a Chase transgressive sequence set. Sequences are defined by bounding maximum-exposure surfaces and are placed within the zone of exposure surfaces (typically, stacked paleosols). Conodonts are abundant in open-marine deposits and most marine units have a differing and characteristic faunal make-up. Eleven species are described as new: &lt;i&gt;Streptognathodus binodosus&lt;/i&gt;, &lt;i&gt;S. denticulatus&lt;/i&gt;, &lt;i&gt;S. elongianus&lt;/i&gt;, &lt;i&gt;S. florensis&lt;/i&gt;, &lt;i&gt;S. lineatus&lt;/i&gt;, &lt;i&gt;S. nevaensis&lt;/i&gt;, &lt;i&gt;S. postconstrictus&lt;/i&gt;, &lt;i&gt;S. postelongatus&lt;/i&gt;, &lt;i&gt;S. robustus&lt;/i&gt;, &lt;i&gt;S. translinearis&lt;/i&gt;, and &lt;i&gt;S. trimilus&lt;/i&gt;.&lt;/p&gt; &lt;p&gt;&lt;b&gt;Part B&lt;/b&gt; Maximum-marine flooding levels and marine-condensed sections from uppermost Carboniferous and Lower Permian fourth-order (0.1-1 m.y.) depositional sequences of the North American midcontinent reveal a rich stratigraphic succession of species of &lt;i&gt;Streptognathodus&lt;/i&gt; and &lt;i&gt;Sweetognathus conodonts&lt;/i&gt; that permits high-precision correlation of the Carboniferous-Permian boundary as well as the Asselian-Sakmarian and Sakmarian-Artinskian boundaries. Eleven new species of &lt;i&gt;Streptognathodus&lt;/i&gt; are described: &lt;i&gt;Streptognathodus binodosus&lt;/i&gt;, &lt;i&gt;S. denticulatus&lt;/i&gt;, &lt;i&gt;S. elongianus&lt;/i&gt;, &lt;i&gt;S. florensis&lt;/i&gt;, &lt;i&gt;S. lineatus&lt;/i&gt;, &lt;i&gt;S. nevaensis&lt;/i&gt;, &lt;i&gt;S. postconstrictus&lt;/i&gt;, &lt;i&gt;S. postelongatus&lt;/i&gt;, &lt;i&gt;S. robustus&lt;/i&gt;, &lt;i&gt;S. translinearis&lt;/i&gt;, and &lt;i&gt;S. trimilus&lt;/i&gt;. Seventeen species are redescribed and clarified and include &lt;i&gt;Streptognathodus alius&lt;/i&gt;, &lt;i&gt;S. barskovi&lt;/i&gt;, &lt;i&gt;S. bellus&lt;/i&gt;, &lt;i&gt;S. brownvillensis&lt;/i&gt;, &lt;i&gt;S. conjunctus&lt;/i&gt;, &lt;i&gt;S. constrictus&lt;/i&gt;, &lt;i&gt;S. elongatus&lt;/i&gt;, &lt;i&gt;S. farmeri&lt;/i&gt;, &lt;i&gt;S. flexuosus&lt;/i&gt;, &lt;i&gt;S. fuchengensis&lt;/i&gt;, &lt;i&gt;S. fusus&lt;/i&gt;, &lt;i&gt;S. invaginatus&lt;/i&gt;, &lt;i&gt;S. isolatus&lt;/i&gt;, &lt;i&gt;S. longissimus&lt;/i&gt;, &lt;i&gt;S. minacutus&lt;/i&gt;, &lt;i&gt;S. nodulinearis&lt;/i&gt;, and &lt;i&gt;S. wabaunsensis&lt;/i&gt;.&lt;/p&gt; &lt;p&gt;The correlated level of the Carboniferous-Permian boundary is recognized in the lower part of the Red Eagle Depositional Sequence based on the introduction of &lt;i&gt;Streptognathodus isolatus&lt;/i&gt; Chernykh, Ritter, and Wardlaw; &lt;i&gt;Streptognathodus minacutus&lt;/i&gt; Barskov and Reimers; &lt;i&gt;Streptognathodus invaginatus&lt;/i&gt; Reshetkova and Chernykh; &lt;i&gt;Streptognathodus fuchengensis&lt;/i&gt; Zhao; and &lt;i&gt;Streptognathodus nodulinearis&lt;/i&gt; Reshetkova and Chernykh. The correlated Carboniferous-Permian boundary occurs in the depositional sequence that represents the maximum-marine highstand of the Council Grove Composite Third Order Sequence. This level represents a significant marine-flooding event that should be correlatable in numerous shelfal sections throughout the world.&lt;/p&gt; &lt;p&gt;Although the Asselian-Sakmarian boundary has not been rigorously defined, &lt;i&gt;Sweetognathus merrilli&lt;/i&gt; has been informally utilized as a Sakmarian indicator. Due to the ecologically controlled distribution of species of &lt;i&gt;Sweetognathus&lt;/i&gt;, we prefer to use a species of &lt;i&gt;Streptognathodus&lt;/i&gt; as a defining species. We propose that &lt;i&gt;Streptognathodus barskovi&lt;/i&gt; (Kozur) Reshetkova be considered as a potentially defining or ancillary defining species for the Sakmarian Stage. In the North American midcontinent, &lt;i&gt;Streptognathodus barskovi&lt;/i&gt; appears in the same depositional sequence with &lt;i&gt;Sweetognathus merrilli&lt;/i&gt; in the Eiss (Lower Bader) Depositional Sequence. Historically, &lt;i&gt;Sweetognathus whitei&lt;/i&gt; has been used to mark the Sakmarian-Artinskian boundary. In our succession &lt;i&gt;Sweetognathus whitei&lt;/i&gt; and &lt;i&gt;Streptognathodus florensis&lt;/i&gt; appear in the basal part of the Barneston Depositional Sequence. We suggest that &lt;i&gt;Streptognathodus florensis&lt;/i&gt; be further investigated as a possible defining or ancillary defining taxon for the base of the Artinskian Stage. This depositional sequence also forms the maximum-marine highstand of the Chase Third-Order Composite Depositional Sequence suggesting that this level is a significant marine-flooding event that should be widely traceable in numerous shelfal sections.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:language>en</dc:language>
  <dc:publisher>The University of Kansas</dc:publisher>
  <dc:title>Stratigraphy and conodont biostratigraphy of the uppermost Carboniferous and Lower Permian from the North American Midcontinent</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>