Historical:Finnie Sandstone 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: McCormick Group >>Abbott Formation >>Finnie Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Atokan Series
Allostratigraphy: Absaroka Sequence


M. E. Hopkins and J. A. Simon

Name Origin

The Finnie Sandstone Member of the Abbott Formation (Owen, 1856, No. 1 vertical section) is named for Finnie Bluff at the type locality.

Type Section

The type section is "along road for less than 2 miles north of Mulfordtown, Union County, Kentucky" (Glenn, 1912, p. 14).

Other Names

"Finnie" was adopted in Illinois to replace "Delwood Sandstone" (Kosanke et al., 1960, p. 31).

Extent and Thickness

The Finnie is widespread throughout much of southern Illinois east of the Du Quoin Monocline. Its bedding varies widely, as does its thickness (up to 60-70 feet).


It is similar in appearance to other sandstones in the Abbott Formation and in a few localities contains scattered marine fossils. The distribution of the Finnie in the deeper part of the Illinois Basin has not been determined.


GLENN, L. C., 1912, A geological reconnaissance of the Tradewater River region, with special reference to the coal beds: Kentucky Geological Survey Bulletin 17, 75 p.
KOSANKE, R. M., J. A. SIMON, H. R. WANLESS, and H. B. WILLMAN, 1960, Classification of the Pennsylvanian strata of Illinois: Illinois State Geological Survey Report of Investigations 214, 84 p.
OWEN, D. D., 1856, Report of the geological survey in Kentucky made during the years 1854 and 1855: Kentucky Geological Survey Bulletin, v. I, Series 1, 416 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation