Usage:
Pillsbury Shale of Wabaunsee Group (KS*,MO*)
Pillsbury Formation of Wabaunsee Group (IA*)
Pillsbury Shale of /Richardson subgroup [informal] of Wabaunsee Group (KS,MO)
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Richardson subgroup considered informal and should not be capitalized.]
Geologic age:
Late Pennsylvanian (Virgilian)*
Type section, locality, area and/or origin of name:
Type exposure: in roadcut in SE/4 NE/4 NE/4 sec. 28, T. 10 S., R. 9 E., Riley Co., northeastern KS. Named from Pillsbury Crossing, a ford across Deep Creek, in NE/4 NW/4 sec. 5, T. 11 S., R. 9 E., Riley Co. (Moore and Mudge, 1956).
Paratype sections (sections typical of facies changes of formations): exposed in stream bank in center of SW/4 NE/4 sec. 32, T. 10 S., R. 9 E., Riley Co., and in NE/4 NE/4 sec. 19, T. 11 S., R. 13 E., Wabaunsee Co., northeastern KS (Moore and Mudge, 1956).
AAPG geologic province:
Nemaha anticline*
Forest City basin*
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 ([ ]).