https://ilstratwiki.web.illinois.edu/index.php?title=Trempealeauan_Stage&feed=atom&action=historyTrempealeauan Stage - Revision history2024-03-28T11:58:22ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Trempealeauan_Stage&diff=13204&oldid=prevAlan.Myers: Reset stable version settings for "Trempealeauan Stage"2016-12-04T21:31:31Z<p>Reset stable version settings for "Trempealeauan Stage"</p>
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{{Tree<br />
|category1=Paleozoic Erathem<br />
|category2=Cambrian System<br />
|category3=Trempealeauan Stage<br />
|category4=Sauk Sequence<br />
|category5=Knox Dolomite Megagroup<br />
|category6=Croixan Series<br />
|tree1=Knox Dolomite Megagroup<br />
|tree21=Paleozoic Erathem<br />
|tree22=Cambrian System<br />
|tree23=Croixan Series<br />
|tree24=Trempealeauan Stage<br />
|tree31=Sauk 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 />
T. C. Buschbach<br />
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==Name==<br />
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===Original description===<br />
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===Derivation===<br />
The Trempealeauan Stage is named for Trempealeau, Trempealeau County, Wisconsin.<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 />
The type section of the Trempealeauan Stage is located in Trempealeau, Trempealeau County, Wisconsin.<br />
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===Type status===<br />
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==Reference section==<br />
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==Stratigraphic relationships==<br />
The Trempealeauan Stage (Howell et al., 1944, chart 1) consists of the strata from the base of the ''Platycolpus-Scoevogyra'' Zone to the top of the ''Plethopeltis'' Zone as they are represented in the type section of the Trempealeau Formation (now called the St. Lawrence Formation). However, more recent work (Raasch, 1951; Lochman-Balk and Wilson, 1958) favors placing the base of the Trempealeauan somewhat lower-- at the base of the ''Saukia'' Zone in the Franconia Formation. As the fossil zones present in other areas have not been recognized in Illinois, the exact position of the base of the Trempealeauan Stage is uncertain and is placed at the top of the Franconia Formation. The Potosi, Eminence, and Jordan Formations are included in the Trempealeauan Stage.<br />
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==Extent and thickness==<br />
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==Lithology==<br />
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==Core&#40;s&#41;==<br />
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==Well log characteristics==<br />
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==Fossils==<br />
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==Age and correlation==<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 />
HOWELL, B. F., et al., 1944, Correlation of the Cambrian formations of North America: Geological Society of America Bulletin, v. 55, p. 993-1003.<br><br />
LOCHMAN-BALK, CHRISTINA, and J. L. WILSON, 1958, Cambrian biostratigraphy in North America: Journal of Paleontology, v. 32, p. 312-350.<br><br />
RAASCH, G. O., 1951, Revision of Croixan dikelocephalids: Illinois Academy of Science Transactions, v. 44, p. 137-151 ; Illinois State Geological Survey Circular 179.<br><br />
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