Pg. 25, 72. Blue Creek coal member of Mansfield formation. Important marker bed in upper part of Mansfield in Huron area. Thickness 4 feet 8 inches at type section. Lies approximately 100 feet above base of upper Mansfield in a sequence of sandstones with wavy bedding. Age is Pennsylvanian.
Type section: in abandoned strip mine at west end of ridge, in SW/4 NW/4 sec. 10, T. 1 N., R. 3 W., Martin Co., south-central IN. Named from exposures at headwaters of Blue Creek.

Source: US geologic names lexicon (USGS Bull. 1200, p. 394).

Pg. 16, pls. Blue Creek Coal Member of Mansfield Formation of Raccoon Creek Group. Coal. Comprises an upper bench, dull banded and slightly fissile to shaly, 2 feet (0.6 m) thick, and a lower bench, bright banded and blocky to hackly, 2.8 feet (0.8 m) thick. Roof is 8 feet (2.4 m) of dark-gray carbonaceous ferruginous shale overlain by 6.5 feet (2.0 m) of yellow-brown to light-gray sandstone; floor is white fire clay. Lies some 60 to 80 feet (18 to 24 m) below top of Mansfield and about 100 feet (30 m) above Pinnick Coal Member. Present in Martin, Dubois, Daviess, and Perry Counties, south-central Indiana. Age is Early Pennsylvanian (Morrowan). Report includes map of type sections-localities-areas, correlation chart.

Source: Publication.