Momence Sandstone Member

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Lithostratigraphy: Knox Dolomite Megagroup >>Eminence Formation >>Momence Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Cambrian System >>Croixan Series >>Trempealeauan Stage
Allostratigraphy: Sauk Sequence

Primary 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)

T. C. Buschbach


Original description

The Momence Sandstone Member of the Eminence Formation (Buschbach, 1964, p. 41).


Named for Momence, Kankakee County, just east of the type section.

Other names


Type section

Type location

The type section of the Momence Sandstone Member is located just west of Momence, Kankakee County, and is at a depth of 1650-1660 feet in the Hughes Oil Company No. 1 Parish boring (NW NW SW 24, 31N-13E) (sample set 997).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

Extent and thickness

The Momence Member varies from 0-15 feet thick but is somewhat discontinuous.


The Momence Sandstone Member is the only member differentiated in the Eminence Formation and occurs at the base. It consists of light gray, dolomitic, poorly sorted sandstone, and in places contains interbedded green and gray sandy shale.




Well log characteristics


Age and correlation

Environments of deposition

Economic importance



BUSCHBACH, T. C., 1964, Cambrian and Ordovician strata of northeastern Illinois: Illinois State Geological Survey Report of Investigations 218, 90 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation