Usage:
Glasford Formation (IL,IN,IA,WI)
Subunits:
(alphabetical): Belvidere Till Member (IL), Berry Clay Member (IL,WI), Duncan Mills Member (IL), Esmond Till Member (IL), Fairdale Till Member (IL), Foxhollow Till Member (IL), Hagarstown Member (IL), Herbert Till Member (IL), Hulick Till Member (IL), Kellerville Till Member (IL), Mulberry Grove Member (IL) or Mulberry Grove Silt Member (IL), Ogle Till Member (IL,WI), Oregon Till Member (IL), Radnor Till Member (IL), Roby Silt Member (IL), Smithboro Till Member (IL,IN,WI), Sterling Till Member (IL), Toulon Member (IL), Vandalia Till Member (IL,IN,WI), Winslow Till Member (IL,WI).
Geologic age:
Quaternary (Pleistocene; Illinoian to Sangamonian)
Type section, locality, area and/or origin of name:
Type section (=Banner Formation type section): Tindall School section, in borrow pit [on west side of U.S. Highway 24/IL Highway 9, a few mi southwest of Glasford], in SW/4 SW/4 NE/4 sec. 31, T. 7 N., R. 6 E., [approx. Lat. 40 deg. 32 min. 42 sec. N., Long. 89 deg. 51 min. 40 sec. W., Glasford 15-min quadrangle], Peoria Co., west-central IL. Named from village of Glasford, Peoria Co., west-central IL (Willman and Frye, 1970).
AAPG geologic province:
Illinois basin
Wisconsin arch
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 ([ ]).