https://ilstratwiki.web.illinois.edu/index.php?title=Prospect_Hill_Siltstone&feed=atom&action=historyProspect Hill Siltstone - Revision history2024-03-28T22:06:10ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Prospect_Hill_Siltstone&diff=15866&oldid=prevJennifer.Obrad at 17:06, 19 January 20172017-01-19T17:06:10Z<p></p>
<p><b>New page</b></p><div>{{Editwithform}}<br />
{{Tree<br />
|category1=Paleozoic Erathem<br />
|category2=Mississippian Subsystem<br />
|category3=Kaskaskia Sequence<br />
|category4=Mammoth Cave Limestone Megagroup<br />
|category5=North Hill Group<br />
|category6=Kinderhookian Series<br />
|tree1=Mammoth Cave Limestone Megagroup<br />
|tree2=North Hill Group<br />
|tree3=Prospect Hill Siltstone<br />
|tree21=Paleozoic Erathem<br />
|tree22=Mississippian Subsystem<br />
|tree23=Kinderhookian Series<br />
|tree31=Kaskaskia 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 />
<br />
==Contributing author&#40;s&#41;==<br />
Elwood Atherton, Charles Collinson, and Jerry A. Lineback<br />
<br />
==Name==<br />
<br />
===Original description===<br />
Prospect Hill Siltstone (Moore, 1928, p. 20; Workman and Gillette, 1956, p. 30).<br />
<br />
===Derivation===<br />
Named for Prospect Hill, near Burlington, Iowa.<br />
<br />
===Other names===<br />
<br />
===History&#47;background===<br />
Originally designated a member of the Hannibal Formation, but Workman and Gillette (1956) differentiated the uppermost beds as the Starrs Cave Formation and made the Prospect Hill a formation in the North Hill Group.<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 />
The Prospect Hill Siltstone is conformable with the underlying McCraney and the overlying Starrs Cave, but where the latter is absent it is overlain unconformably by the Burlington Limestone.<br />
<br />
==Extent and thickness==<br />
The Prospect Hill Siltstone occurs in extreme western Illinois within the area underlain by the McCraney Limestone (fig. M-9). It has a maximum thickness of 29 feet but thins eastward to its boundary. It is exposed above the McCraney along Fall Creek in southern Adams County (SE 23, 3S-8W).<br />
<br />
<center><br />
{| class="wikitable" style="text-align: center;"<br />
|-<br />
|<gallery caption="" widths=250px heights=250px perrow=4><br />
Figure_M-9.jpg|{{file:Figure_M-9.jpg}}<br />
</gallery><br />
|}<br />
</center><br />
<br />
==Lithology==<br />
The siltstone is light gray to buff, calcareous, pyritic, massive, and friable.<br />
<br />
==Core&#40;s&#41;==<br />
<br />
==Photograph&#40;s&#41;==<br />
<br />
==Contacts==<br />
<br />
==Well log characteristics==<br />
<br />
==Fossils==<br />
The Prospect Hill contains few macrofossils, however, conodonts are abundant.<br />
<br />
==Age and correlation==<br />
The abundant conodonts in the Prospect Hill show a close correlation with the upper part of the Chouteau Limestone (Collinson, 1961, 1964).<br />
<br />
==Environments of deposition==<br />
<br />
==Economic importance==<br />
<br />
==Remarks==<br />
<br />
==References==<br />
COLLINSON, CHARLES, 1961, Kinderhookian Series in the Mississippi Valley, ''in'' Northeastern Missouri and west-central Illinois: Kansas Geological Society Guidebook, 26th Annual Field Conference, Missouri Geological Survey Report of Investigations 27, p. 100-109; Illinois State Geological Survey Reprint 1961-U.<br><br />
COLLINSON, CHARLES, 1964, Western Illinois: 28th Annual Tri-State Field Conference, Quincy, Illinois, Illinois State Geological Survey Guidebook Series 6, 30 p.<br><br />
MOORE, R. C., 1928, Early Mississippian formations in Missouri: Missouri Bureau of Geology and Mines, v. 21, 283 p.<br><br />
WORKMAN, L. E., and TRACEY GILLETTE, 1956, Subsurface stratigraphy of the Kinderhook Series in Illinois: Illinois State Geological Survey Report of Investigations 189, 46 p.<br />
<br />
{{Codes<br />
|membercode=5460<br />
|geo_unit=--<br />
}}</div>Jennifer.Obrad