https://ilstratwiki.web.illinois.edu/index.php?title=Historical:Trempealeauan_Stage&feed=atom&action=historyHistorical:Trempealeauan Stage - Revision history2024-03-29T00:58:34ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Historical:Trempealeauan_Stage&diff=12894&oldid=prevJennifer.Obrad at 15:50, 23 November 20162016-11-23T15:50:25Z<p></p>
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{{Tree<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 />
|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 />
}}<br />
==Author==<br />
T. C. Buschbach<br />
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==Name Origin==<br />
The Trempealeauan Stage is named for Trempealeau, Trempealeau County, Wisconsin.<br />
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==Type Section==<br />
The type section of the Trempealeauan Stage is located in Trempealeau, Trempealeau County, Wisconsin.<br />
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==Stratigraphic Position==<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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==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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