<?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>Clyde P. Ross</dc:creator>
  <dc:date>1962</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Some recent paleogeographic maps indicate that&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;central&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;was part of a major geosyncline throughout&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;time. This concept, apparently based on thick marine accumulations far apart on the margins of the region, is inconsistent with field data. Within the area of the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;batholith, Permian(?) volcanic rocks rest either on batholithic rocks or on the Belt Series. The Belt Series rocks have furnished the xenoliths in the batholith. To the west upper&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;and Mesozoic strata are invaded. Along the eastern margin, south of lat. 45°, thick&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;strata are intruded by the batholith. These locally exceed 30,000 feet in thickness and thin eastward. They have many variations. Those close to the batholith, especially those high in the sequence, are regarded as of near-shore origin. The&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;strata in southeastern&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;, more than 17,000 feet thick, are broadly similar except that Cambrian strata there are thicker and more widespread. The part of&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;central&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;north of the vicinity of lat. 45° has no known&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;strata. Northern&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;has only a few outcrops of beds of Cambrian age. The differences in thickness and character between&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;strata in south-&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;central&lt;/span&gt;&lt;span&gt;&amp;nbsp;and southeastern&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;and those in western Montana and Wyoming (less than 7500 feet thick) suggest a hinge line near the eastern boundary between&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;and Montana with a shelf to the east and a trough to the west. In south-&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;central&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;this trough had a maximum width of 90 miles and a western shore roughly at the east margin of the batholith. This trough wedged out northward a little beyond lat. 45°. Thus the area of the present&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;batholith has been a positive block since Precambrian time, comparable to but apparently of longer duration than the geanticline in northern Nevada. Any invasion of the positive block in&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Idaho&lt;/span&gt;&lt;span&gt;&amp;nbsp;by marine waters during the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;was local and brief, except perhaps along the western border. Uncertain correlations within the area of the batholith leave open the possibility of some deposition there early in&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Paleozoic&lt;/span&gt;&lt;span&gt;&amp;nbsp;time.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1130/0016-7606(1962)73[769:PSOCI]2.0.CO;2</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Geological Society of America</dc:publisher>
  <dc:title>Paleozoic seas of central Idaho</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>