Mayfield Member

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Lithostratigraphy: Potsdam Sandstone Megagroup >>Mt. Simon Sandstone >>Mayfield Member
Chronostratigraphy: Paleozoic Erathem >>Cambrian System >>Croixan Series >>Dresbachian 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 Mayfield Member of the Mt. Simon Sandstone (Templeton, 1950, p. 155).


Named for Mayfield Township, De Kalb County.

Other names


Type section

Type location

The type section of the Mayfield Member of the Mt. Simon Sandstone is located 5 miles east of Mayfield Township, De Kalb County. It is the interval from 2495-2850 feet deep (sample set 1301) in the same boring as the Crane Member.

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The Mayfield Member overlies the Lovell Member of the Mt. Simon Sandstone.

Extent and thickness

The Mayfield Member is 145-390 feet thick.


It is composed of interbedded very coarse-grained conglomeratic sandstone and finer grained nonconglomeratic sandstone.




Well log characteristics


Age and correlation

Environments of deposition

Economic importance



TEMPLETON, J. S., 1950, Mt. Simon Sandstone in northern Illinois: Illinois Academy of Science Transactions, v. 43, p. 151-159.

ISGS Codes

Stratigraphic Code Geo Unit Designation