Inglefield Sandstone Member

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Lithostratigraphy: McLeansboro Group >>Modesto Formation >>Inglefield Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Missourian Series
Allostratigraphy: Absaroka 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)

M. E. Hopkins and J. A. Simon


Original description

The Inglefield Sandstone Member of the Modesto Formation (Fuller and Ashley, 1902, p. 3).


Named for Inglefield, Vanderburgh County, Indiana.

Other names


Type section

Type location

The type locality consists of exposures in a railroad cut south of the town of Inglefield.

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The sandstone occurs above the Chapel (No. 8) Coal and below the Womac Coal (Andresen, 1961).

Extent and thickness

It is known primarily in eastern Illinois, but it was reported by Andresen to split into two distinct sandstones in southwestern Illinois, the lower unit occurring below the Carlinville Limestone. The Inglefield Sandstone locally exceeds 80 feet in channels oriented south-southwest, but it is relatively widespread as a much thinner sheet sandstone in most of the Illinois Basin.





Well log characteristics


Age and correlation

Environments of deposition

Economic importance



ANDRESEN, M. J., 1961 , Geology and petrology of the Trivoli Sandstone in the Illinois Basin: Illinois State Geological Survey Circular 316, 31 p.
FULLER, M. L., and G. H. ASHLEY, 1902, Ditney Quadrangle: USGS Geologic Atlas Folio 84, 8 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation