You do not have permission to edit this page, for the following reason:
The action you have requested is limited to users in the group: Users.
For Help in formatting please see the Wiki Help
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.
T. C. Buschbach
The Trempealeauan Stage is named for Trempealeau, Trempealeau County, Wisconsin.
The type section of the Trempealeauan Stage is located in Trempealeau, Trempealeau County, Wisconsin.
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.
place a <pre><br></pre>at the end of a line to get a line return
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>
LOCHMAN-BALK, CHRISTINA, and J. L. WILSON, 1958, Cambrian biostratigraphy in North America: Journal of Paleontology, v. 32, p. 312-350.<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>
Save page Show preview Show changes Cancel