Historical:Tarter Coal Member
M. E. Hopkins and J. A. Simon
The Tarter Coal Member of the Abbott Formation (Wanless, 1939, p. 15, 103) is named for Tarter Bridge over the Spoon River, Fulton County.
The type section consists of exposures near Tarter Bridge (SE 2, 5N-1E) (Wanless, 1956, p. 9; 1957, p. 67, 202).
The Tarter is correlated with the Willis Coal of southern Illinois and the Lower Block Coal Member of Indiana.
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.
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.
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.
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