Usage:
Riverton Shale (MO)
(†Riverton Formation not used by the KS Geol. Survey; type locality in KS.)
Subunits:
Ladden Branch Limestone Member.
Geologic age:
Middle Pennsylvanian (Atokan)
Type section, locality, area and/or origin of name:
Type section: adjacent to and beneath the arched concrete bridge over Brush Creek (formerly U.S. Highway 66), 2 mi west of town of Riverton, center of west line in NW/4 NW/4 sec. 24, T. 34 S., R. 24 E., Cherokee Co., KS [From MO Geol. Survey lexicon (Thompson, 2001)].
Reference section: along banks and bed of Marias des Cygens River, upstream and downstream from a bridge, 1.5 mi southwest of Prairie City, in E/2 sec. 23 and W/2 sec. 24, T. 38 N., R. 30 W., Pappinville 7.5-min quadrangle, Bates Co., MO [From MO Geol. Survey lexicon (Thompson, 2001)].
Named from Riverton coal in Cherokee Co., southwestern KS (Searight, 1955).
AAPG geologic province:
Chautauqua platform
Cherokee basin
Forest City basin
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 ([ ]).