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.
Elwood Atherton, Charles Collinson, and Jerry A. Lineback
The Kidd Member of the Salem Limestone (Baxter, 1960a, p. 19-22; Lineback, 1972, p. 5).
Named for Kidd, Monroe County.
As originally defined, it included the Harrodsburg Member of the Ullin Limestone, but it was restricted by Lineback to the biocalcarenite below the Fults Member and above the Ullin.
The type section of the Kidd Member is in the Mississippi River bluffs east of the village of Kidd, Monroe County (NE NE 1, 5S-10W).
The Kidd Member is the basal member of the Salem Limestone.
Extent and thickness
In the type section the Kidd consists of about 22 feet of chert-free, high-calcium biocalcarenite, largely made up of medium and coarse grains of fragmented fossils, mostly crinoid columnals and bryozoan detritus, in beds 2-3 feet thick.
Well log characteristics
The foraminifers Endothyra sp., Tournayella sp., and Globoendothyra sp. are present. Globoendothyra baileyi is common and becomes more common in the upper half of the member.
Age and correlation
Environments of deposition
BAXTER, J. W., 1960a, Salem Limestone in southwestern Illinois: Illinois State Geological Survey Circular 284, 32p.
LINEBACK, J. A., 1972, Lateral gradation of the Salem and St. Louis Limestones (Middle Mississippian) in Illinois: Illinois State Geological Survey Circular 474, 23 p.
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