Edit a page: Glencoe Member

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]

The Glencoe Member of the Spechts Ferry Formation (Templeton and Willman, 1963, p. 110).

Derivation[edit]

Named for Glencoe, St. Louis County, Missouri, which is 3 miles west of the type section.

Other names[edit]

History/background[edit]

Type section[edit]

Type location[edit]

The type section of the Glencoe Member is the same as that for the Castlewood Member (near Castlewood, St. Louis County, Missouri (NE SE SE 21, 44N-4E)), where the Glencoe is 5.3 feet thick.

Type author(s)[edit]

Type status[edit]

Reference section[edit]

Reference location[edit]

Reference author(s)[edit]

Reference status[edit]

Stratigraphic relationships[edit]

The Glencoe Member overlies the Castlewood Member of the Spechts Ferry Formation.

Extent and thickness[edit]

The Glencoe Member is commonly 5-8 feet thick in the area near the Mississippi River, but it thins to the east.

Lithology[edit]

The most persistent and thickest Ordovician bentonite, commonly 1-3 inches thick and locally as much as 8 inches thick, occurs in the lower part of the Glencoe Member, interbedded with green, gray, or brown shale. Locally the bentonite is altered to a distinctive, hard, pink bed, which is almost entirely potash feldspar. The Glencoe is largely green shale, but it contains beds of calcarenite, greenish gray argillaceous limestone, and dark purplish gray coarse-grained limestone.

Core(s)[edit]

Photograph(s)[edit]

Contacts[edit]

Well log characteristics[edit]

Fossils[edit]

Some beds of the Glencoe Member are a coquina of ''Pionodema subaequafa''. In the Upper Mississippi Valley, the trilobite ''Isotelus gigas'' (fig. O-5) is common in an argillaceous limestone bed near the base. <center> {| class="wikitable" style="text-align: center;" |- |<gallery caption="" widths=250px heights=250px perrow=4> Figure_O-5.jpg|{{file:Figure_O-5.jpg}} </gallery> |} </center>

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