https://ilstratwiki.web.illinois.edu/index.php?title=Chazyan_Stage&feed=atom&action=historyChazyan Stage - Revision history2024-03-29T09:13:39ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Chazyan_Stage&diff=15505&oldid=prevJennifer.Obrad: /* Name */2017-01-12T19:57:22Z<p><span dir="auto"><span class="autocomment">Name</span></span></p>
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{{Tree<br />
|category1=Paleozoic Erathem<br />
|category2=Ordovician System<br />
|category3=Chazyan Stage<br />
|category4=Tippecanoe Sequence<br />
|category5=Knox Dolomite Megagroup<br />
|category6=Champlainian Series<br />
|tree1=Knox Dolomite Megagroup<br />
|tree21=Paleozoic Erathem<br />
|tree22=Ordovician System<br />
|tree23=Champlainian Series<br />
|tree24=Chazyan Stage<br />
|tree31=Tippecanoe Sequence<br />
}}<br />
==Primary source==<br />
Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.<br />
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==Contributing author&#40;s&#41;==<br />
H. B. Willman and T. C. Buschbach<br />
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==Name==<br />
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===Original description===<br />
Chazyan Stage (Emmons, 1842, p. 107; Grabau, 1989, p. 223).<br />
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===Derivation===<br />
Named for Chazy, New York.<br />
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===Other names===<br />
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===History&#47;background===<br />
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==Type section==<br />
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===Type location===<br />
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===Type status===<br />
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==Reference section==<br />
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==Stratigraphic relationships==<br />
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==Extent and thickness==<br />
In Illinois the Chazyan Stage includes only the Everton Dolomite, which is not exposed but is encountered in drilling in the southwestern part of the state.<br />
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==Lithology==<br />
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==Core&#40;s&#41;==<br />
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==Contacts==<br />
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==Well log characteristics==<br />
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==Fossils==<br />
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==Age and correlation==<br />
The Everton is correlated with the type Chazyan on the basis of the fauna in the Everton type area in Arkansas and by subsurface tracing (Templeton and Willman, 1963).<br />
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==Environments of deposition==<br />
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==Economic importance==<br />
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==Remarks==<br />
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==References==<br />
EMMONS, EBENEZER, 1842, Geology of New York, Part 2, comprising the survey of the second geological district: Albany, 437 p.<br><br />
GRABAU, A. W., 1909, Physical and faunal evolution of North America during Ordovicic, Siluric, and early Devonic time: Journal of Geology, v. 17, p. 209-252.<br><br />
TEMPLETON, J. S., and H. B. WILLMAN, 1963, Champlainian Series (Middle Ordovician) in Illinois: Illinois State Geological Survey Bulletin 89, 260 p.<br />
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