Tarter Coal Member

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Lithostratigraphy: McCormick Group >>Abbott Formation >>Tarter Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Atokan 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 Tarter Coal Member of the Abbott Formation (Wanless, 1939, p. 15, 103).


Named for Tarter Bridge over the Spoon River, Fulton County.

Other names


Type section

Type location

The type section consists of exposures near Tarter Bridge (SE 2, 5N-1E) (Wanless, 1956, p. 9; 1957, p. 67, 202).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The interval from the Tarter Coal up to the Pope Creek Coal is usually only a few feet, and both coals are present in several outcrops.

Extent and thickness

The Tarter Coal is thin and discontinuous throughout its outcrop area in western Illinois (Wanless, 1957), attaining a maximum thickness of slightly over 1 foot in many scattered outcrops.





Well log characteristics


Age and correlation

The Tarter is correlated with the Willis Coal of southern Illinois and the Lower Block Coal Member of Indiana.

Environments of deposition

Economic importance



WANLESS, H. R., 1939, Pennsylvanian correlations in the Eastern Interior and Appalachian coal fields: Geological Society of America Special Paper 17, 130 p.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation