Lowell Coal Member

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Lithostratigraphy: Kewanee Group >>Carbondale Formation >>Lowell Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka 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)

M. E. Hopkins and J. A. Simon


Original description

The Lowell Coal Member of the Carbondale Formation (Willman and Payne, 1942, p. 102-105).


Named for Lowell, La Salle County.

Other names


Type section

Type location

The type section of the Lowell Coal is an exposure on the Vermilion River (SE SW 8, 32N-2E).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

Extent and thickness

The Lowell Coal is present in northern Illinois and in the southern part of western Illinois. The coal is 10 inches thick in the type section.


It is a bright-banded, rather shaly coal underlain by a silty to sandy underclay and overlain by several feet of gray shale that contains two limestone beds, which are equivalent to upper units of the Oak Grove Limestone. The underclay overlies a siltstone containing plant root impressions, which in turn is underlain by gray shale containing additional limestone units equivalent to the Oak Grove Limestone.




Well log characteristics


Age and correlation

It is equivalent to the Shawneetown Coal in southwestern, southern, and eastern Illinois.

Environments of deposition

Economic importance



WILLMAN, H. B., and J. N. PAYNE, 1942, Geology and mineral resources of the Marseilles, Ottawa, and Streator Quadrangles: Illinois State Geological Survey Bulletin 66, 388 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation