Usage:
Blackwater Creek Shale Member of Little Osage Formation of /Fort Scott subgroup [informal] of Marmaton Group (MO)
Originally misspelled Backwater Creek.
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Fort Scott subgroup considered informal and should not be capitalized.]
Subunits:
Flint Hill sandstone facies (informal) (MO).
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Type section: in east cut bank of tributary to Rocky Fork Creek on east side of northbound lane of U.S. Highway 63 at western edge of Finger Lakes State Park, 0.25 mi north of a crossroad [Peabody Road], 4.5 mi northwest of Browns, in SW/4 SW/4 NW/4 NE/4 sec. 36, T. 50 N., R. 13 W., [approx. Lat. 39 deg. 04 min. 49 sec. N., Long. 92 deg. 19 min. 47 sec. W.], Browns 7.5-min quadrangle, Boone Co., central MO (Thompson and Gentile, 2004).
Reference sections: (1) can be seen in an almost continuous series of highwall exposures in secs. 5 through 20, T. 56 N., R. 14 W., Bevier South and Macon 7.5-min quadrangles, Macon Co., central MO; (2) entrance road to Hilty Quarries, Inc., on north side of Henry Co. Route H, 0.75 mi west of junction of H with Co. Route K, 3 mi west of Montrose, in NW/4 SE/4 NW/4 sec. 16, T. 40 N., R. 28 W., Johnstown 7.5-min quadrangle, Henry Co., central MO (Thompson and Gentile, 2004).
AAPG geologic province:
Cherokee basin
Forest City basin
Illinois basin
Lincoln anticline
Ozark uplift
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).