T. C. Buschbach
The Mayfield Member of the Mt. Simon Sandstone (Templeton, 1950, p. 155), which overlies the Lovell Member, is named for Mayfield Township, De Kalb County.
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.
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.
TEMPLETON, J. S., 1950, Mt. Simon Sandstone in northern Illinois: Illinois Academy of Science Transactions, v. 43, p. 151-159.
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