Pg. 37, 78. Babylon sandstone is normally basal Pennsylvanian member in western Illinois. Sandstone is medium-grained, well-sorted, and free from feldspar, mica, and argillaceous matter. Occurs below Babylon coal.
Type locality: along Spoon River, 0.5 mi north of Babylon, in NE/4 NE/4 sec. 14, T. 7 N., R. 1 E., Fulton Co., west-central IL.

Source: US geologic names lexicon (USGS Bull. 1200, p. 187); supplemental information from GNU records (USGS DDS-6; Reston GNULEX).

Pg. 50 (fig. 22), 65, 201, 202, 203. Babylon sandstone, present in practically all parts of area where cyclothem occurs, has maximum exposed thickness of 25 feet. Cyclothem occurs near base of Tradewater group and in sequence underlies Tartar cyclothem.

Source: US geologic names lexicon (USGS Bull. 1200, p. 187); supplemental information from GNU records (USGS DDS-6; Reston GNULEX).

Pg. 31, 44 (table 1). Babylon sandstone member of Abbott formation (new) of McCormick group (new). Recognized in northern and western Illinois. Occurs at base of formation below Manley coal member (new). Provisionally correlated with Grindstaff sandstone member in southern Illinois; pending further study, both names are retained. Age is Pennsylvanian. Report presents new rock-stratigraphic classification of Pennsylvanian strata in Illinois. Cyclical classification retained but is entirely independent of rock-stratigraphic classification.

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 187); supplemental information from GNU records (USGS DDS-6; Reston GNULEX).