Drummond Member
Lithostratigraphy: Hunton Limestone Megagroup >>Kankakee Formation >>Drummond Member
Chronostratigraphy: Paleozoic Erathem >>Silurian System >>Alexandrian Series
Allostratigraphy: Tippecanoe Sequence
Primary source
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.
Contributing author(s)
H. B. Willman and Elwood Atherton
Name
Original description
The Drummond Member of the Kankakee Formation (Willman, 1973, p. 17).
Derivation
Named for Drummond, Will County, 5.5 miles southwest of the type section.
Other names
History/background
Type section
Type location
The type section of the Drummond Member is located in a railroad cut on the southeast side of the Des Plaines River Valley, 2 miles southwest of Joliet, Will County (NW SE SW 30, 35N-10E), where the member is 8.5 feet thick.
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
The Drummond Member is the basal member of the Kankakee Formation.
Extent and thickness
The Drummond Member is as much as 11 feet thick in the Joliet area but thins to only 1 foot thick along the Kankakee River.
Lithology
The Drummond Member is pure, vesicular to coarsely vuggy, gray dolomite that generally contains abundant grains of glauconite, scattered grains of well rounded quartz sand, relatively large chert nodules, and large colonies of corals.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
The Platymerella Zone occurs in the lower part of the Drummond Member, with the fossils most common in lenses of chert.
Age and correlation
Environments of deposition
Economic importance
Remarks
References
WILLMAN, H. B., 1973, Rock stratigraphy of the Silurian System in northeastern and northwestern Illinois: Illinois State Geological Survey Circular 479, 55 p.
ISGS Codes
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