https://ilstratwiki.web.illinois.edu/index.php?title=Wilcox_Formation&feed=atom&action=historyWilcox Formation - Revision history2024-03-28T11:28:00ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Wilcox_Formation&diff=15591&oldid=prevJennifer.Obrad: /* Name */2017-01-12T22:57:29Z<p><span dir="auto"><span class="autocomment">Name</span></span></p>
<p><b>New page</b></p><div>{{Editwithform}}<br />
{{Tree<br />
|category1=Cenozoic Erathem<br />
|category2=Tertiary System<br />
|category3=Embayment Megagroup<br />
|category4=Eocene Series<br />
|category5=Wilcox Formation<br />
|tree1=Embayment Megagroup<br />
|tree2=Wilcox Formation<br />
|tree21=Cenozoic Erathem<br />
|tree22=Tertiary System<br />
|tree23=Eocene Series<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 />
<br />
==Contributing author&#40;s&#41;==<br />
H. B. Willman and John C. Frye<br />
<br />
==Name==<br />
<br />
===Original description===<br />
Wilcox Formation (Crider and Johnson, 1906, p. 5, 9).<br />
<br />
===Derivation===<br />
Named for Wilcox County, Alabama.<br />
<br />
===Other names===<br />
It was formerly called Lagrange in Illinois (Lamar and Sutton, 1930).<br />
<br />
===History&#47;background===<br />
<br />
==Type section==<br />
<br />
===Type location===<br />
<br />
===Type author&#40;s&#41;===<br />
<br />
===Type status===<br />
<br />
==Reference section==<br />
<br />
===Reference location===<br />
<br />
===Reference author&#40;s&#41;===<br />
<br />
===Reference status===<br />
<br />
==Stratigraphic relationships==<br />
<br />
==Extent and thickness==<br />
The Wilcox Formation is exposed in Illinois only in Pulaski County (Pryor and Ross, 1962), along the east side of the Cache River south of Unity, particularly in a pit where 20 feet of sand of the Wilcox Formation overlies the Porters Creek Formation and is overlain by the Mounds Gravel (SE SW SW 7, 16S-1W) (Pryor and Ross, 1962). It is only 20-30 feet thick in the outcrop area, but it thickens southward and is as much as 250 feet thick in subsurface near Cairo, Alexander County.<br />
<br />
==Lithology==<br />
The Wilcox Formation varies from white, fine to medium, slightly micaceous sand to gray, nearly white, silty or sandy clay.<br />
<br />
==Core&#40;s&#41;==<br />
<br />
==Photograph&#40;s&#41;==<br />
<br />
==Contacts==<br />
<br />
==Well log characteristics==<br />
<br />
==Fossils==<br />
<br />
==Age and correlation==<br />
The Wilcox Formation probably is equivalent to only part of the Wilcox farther south in Kentucky and Tennessee.<br />
<br />
==Environments of deposition==<br />
The Wilcox Formation was deposited in a delta at the head of the embayment.<br />
<br />
==Economic importance==<br />
<br />
==Remarks==<br />
<br />
==References==<br />
CRIDER, A. F., and L. C. JOHNSON, 1906, Summary of the underground water resources of Mississippi: USGS Water Supply Paper 159, 86 p.<br><br />
LAMAR, J. E., and A. H. SUTTON, 1930, Cretaceous and Tertiary sediments of Kentucky, Illinois, and Missouri: American Association of Petroleum Geologists Bulletin, v. 14, p. 845-866.<br><br />
PRYOR, W. A., and C. A. ROSS, 1962, Geology of the Illinois parts of the Cairo, La Center, and Thebes Quadrangles: Illinois State Geological Survey Circular 332, 39 p.<br><br />
<br />
{{Codes<br />
|membercode=1250<br />
|geo_unit=Tw<br />
}}</div>Jennifer.Obrad