Historical:Crane Member

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Handbook of Illinois Stratigraphy
Series Bulletin 95
Author H. B. Willman, Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, Jack A. Simon
Date 1975
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Lithostratigraphy: Potsdam Sandstone Megagroup >>Mt. Simon Sandstone >>Crane Member
Chronostratigraphy: Paleozoic Erathem >>Cambrian System >>Croixan Series >>Dresbachian Stage
Allostratigraphy: Sauk Sequence

Author

T. C. Buschbach

Name Origin

The Crane Member of the Mt. Simon Sandstone (Templeton, 1950, p. 154), the basal member, is named for Crane School, De Kalb County.

Type Section

The type section of the Crane Member is the interval from 3105-3845 feet deep in Wyman No. 1 boring (NE NE SE 35, 41N-5E) (sample set 1301). It is located 4 miles north of the School for which it is named in De Kalb County.

Extent and Thickness

The Crane Member is 620-740 feet thick, and it has been differentiated in only a few wells in central northern Illinois.

Description

It is relatively fine grained, but some of it is medium grained and a few small pebbles are present in places. The lower part is generally shaly, silty, and arkosic.

References

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
8880
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