Usage:
Root Shale of Wabaunsee Group (IA,KS*,NE*)
Root Shale of /Richardson subgroup [informal] of Wabaunsee Group (KS)
["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.]
Subunits:
(alphabetical) --all in IA,KS*,NE*: French Creek Member, Friedrich Member, Jim Creek Limestone Member.
Geologic age:
Late Pennsylvanian (Virgilian)*
Type section, locality, area and/or origin of name:
Type section: in roadcut along east-flowing stream near center of N/2 SE/4 sec. 20, T. 21 S., R. 11 E., Lyon Co., east-central KS. Named from Root Station on the Atchison, Topeka, and Santa Fe RR, in SE/4 sec. 23, T. 21 S., R. 11 E., Lyon Co., east-central KS (Moore and Mudge, 1956).
AAPG geologic province:
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 ([ ]).