Edit a page: Ancell Group

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 | edit source]

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 | edit source]

H. B. Willman and T. C. Buschbach

Name[edit | edit source]

Original description[edit | edit source]

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

Derivation[edit | edit source]

Named for Ancell in southeastern Missouri.

Other names[edit | edit source]

History/background[edit | edit source]

Type section[edit | edit source]

Type location[edit | edit source]

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 | edit source]

Type status[edit | edit source]

Reference section[edit | edit source]

Reference location[edit | edit source]

Reference author(s)[edit | edit source]

Reference status[edit | edit source]

Stratigraphic relationships[edit | edit source]

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 | edit source]

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 | edit source]

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 | edit source]

Photograph(s)[edit | edit source]

Contacts[edit | edit source]

Well log characteristics[edit | edit source]

Fossils[edit | edit source]

Age and correlation[edit | edit source]

Environments of deposition[edit | edit source]

Economic importance[edit | edit source]

Remarks[edit | edit source]

Reference(s)[edit | edit source]

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

Save page Show preview Show changes Cancel