Historical:Kenwood 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
Link Web page
PDF PDF file
Store ISGS Store

Lithostratigraphy: Hunton Limestone Megagroup >>Wapsipinicon Limestone >>Kenwood Member
Chronostratigraphy: Paleozoic Erathem >>Devonian System >>Middle Devonian Series
Allostratigraphy: Kaskaskia Sequence


Charles Collinson and Elwood Atherton

Name Origin

The Kenwood Member of the Wapsipinicon Limestone (Norton, 1894, p. 23; Stainbrook, 1935, p. 251), which overlies the Otis Member, is named for Kenwood Park in the northern part of Cedar Rapids, Linn County, Iowa.

Type Section

The type section of the Kenwood Member of the Wapsipinicon Limestone is located in an exposure along Indian Creek near for Kenwood Park in the northern part of Cedar Rapids, Linn County, Iowa.

Extent and Thickness

The Kenwood is 15-20 feet thick in the outcrop area. It is 10 feet thick where exposed at the base of a quarry half a mile southeast of Milan, Rock Island County (NW 25, 17N-2W), and 16 feet in the quarry on the south side of Rock Island, Rock Island County (SE 14, 17N-2W), but the base is not exposed in either quarry.


As originally defined, the Kenwood included strata later differentiated as the Spring Grove Member (Stainbrook, 1935). The Kenwood consists of laminated or thin-bedded, argillaceous, dolomitic limestone with strongly brecciated beds and pockets of clay.


NORTON, W. H., 1894, Notes on the lower strata of the Devonian Series in eastern Iowa: Iowa Academy of Science Proceedings 1, part 4, p. 22-24.
STAINBROOK, M. A., 1935, Stratigraphy of the Devonian System of the Upper Mississippi Valley: Kansas Geological Society Guidebook, 9th Annual Field Conference, p. 248-260.

ISGS Codes

Stratigraphic Code Geo Unit Designation