Usage:
Robein Member of Roxana Silt of Mason Group (IL*-subsurface)
Geologic age:
Pleistocene (Wisconsinan Age)*
Type section, locality, area and/or origin of name:
Type section: Farm Creek section, along south side of Farm Creek, 1.3 mi (2 km) south of Sunnyland, in NE/4 SW/4 SE/4 sec. 30, T. 26 N., R. 3 W., Tazewell Co., north-central IL. Named from village of Robein, Tazewell Co., north-central IL (Willman and Frye, 1970; see Hansel and Johnson, 1996).
Principal reference sections (Hansel and Johnson, 1996):
(1) Athens north quarry section, in north highwall of limestone quarry, 5 mi (8 km) northeast of Athens, in SW/4 SE/4 NE/4 sec. 18, T. 18 N., R. 5 W., Mason City SW 7.5-min quadrangle, Menard Co., IL;
(2) Charleston section, in south wall of Charleston stone quarry, approx. 500 ft (152 m) west of Embarrass River and 100 ft (30 m) north of RR tracks, in SW/4 NW/4 sec. 5, T. 12 N., R. 10 E., Ashmore 7.5-min quadrangle, Coles Co., east-central IL;
(3) Farm Creek section, on south side of Farm Creek, in NE/4 SW/4 SE/4 sec. 30, T. 26 N., R. 3 W., Washington 7.5-min quadrangle, Tazewell Co., IL.
AAPG geologic province:
Illinois 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 ([ ]).