Edit a page: Ancell Group

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

Categories:
	1:	2:
	3:	4:
	5:	6:
	7:	8:
	9:	10:

Lithostratigraphy
	1:	2:
	3:	4:
	5:	6:
	7:	8:
	9:	10:

Chronostratigraphy
	1:	2:
	3:	4:
	5:	6:
	7:	8:
	9:	10:

Allostratigraphy
	1:	2:
	3:	4:
	5:	6:
	7:	8:
	9:	10:

Hydrostratigraphy
	1:	2:
	3:	4:
	5:	6:
	7:	8:
	9:	10:

Primary source[edit]

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.

Contributing author(s)[edit]

H. B. Willman and T. C. Buschbach

Name[edit]

Original description[edit]

Ancell Group (Templeton and Willman, 1963, p. 29).

Derivation[edit]

Named for Ancell in southeastern Missouri.

Other names[edit]

History/background[edit]

Type section[edit]

Type location[edit]

The type section of the Ancell Group is a composite of several sections in the bluffs north of Ancell, between Dutchtown and Rock Levee, Missouri.

Type author(s)[edit]

Type status[edit]

Reference section[edit]

Reference location[edit]

Reference author(s)[edit]

Reference status[edit]

Stratigraphic relationships[edit]

North of a line roughly extending from Chicago to Quincy, the Ancell strata above the St. Peter Sandstone consist of the members of the Glenwood Formation, but south of that line they consist of the Joachim and Dutchtown Formations (fig. O-15). The Glenwood, Dutchtown, and Joachim Formations all appear to have a facies relation to the upper part (Starved Rock Member) of the St. Peter Sandstone (fig. O-16). <center> {| class="wikitable" style="text-align: center;" |- |<gallery caption="" widths=250px heights=250px perrow=4> Figure_O-15.jpg|{{file:Figure_O-15.jpg}} Figure_O-16.jpg|{{file:Figure_O-16.jpg}} </gallery> |} </center>

Extent and thickness[edit]

As the Everton is present only in southern Illinois, the Ancell Group overlies Canadian strata in most of the state or Cambrian strata locally. Ancell strata underlie most of Illinois, and they vary in thickness from a few feet to as much as 900 feet.

Lithology[edit]

The Ancell Group consists of the sandstone and the argillaceous and sandy limestone and dolomite formations that overlie the Everton Dolomite and underlie the Platteville Group, which is relatively pure limestone. The St. Peter Sandstone is the basal formation in the group.

Core(s)[edit]

Photograph(s)[edit]

Contacts[edit]

Well log characteristics[edit]

Fossils[edit]

Age and correlation[edit]

Environments of deposition[edit]

Economic importance[edit]

Remarks[edit]

Reference(s)[edit]

place a <pre><br></pre>at the end of a line to get a line return TEMPLETON, J. S., and H. B. WILLMAN, 1963, Champlainian Series (Middle Ordovician) in Illinois: Illinois State Geological Survey Bulletin 89, 260 p.

Membercode:
Geo_unit:
Geo_image:	Upload file

Summary:

This is a minor edit Watch this page

Cancel