Usage:
Horton Creek Formation (MO)
Horton Creek Limestone (MO)
Horton Creek Member of Hannibal Shale (MO)
[?] Horton Creek Member of Hannibal Shale (IL)
[?] Horton Creek Formation of New Albany Group (IL)
Subunits:
Hamburg Oolite Bed
Geologic age:
Early Mississippian
Type section, locality, area and/or origin of name:
Type section: hillside on south bank of Horton Creek, in NW/4 NW/4 NW/4 sec. 6, T. 6 S., R. 5 W., Pike Co., IL (Conkin and Conkin, 1973).
AAPG geologic province:
Illinois basin
Lincoln anticline
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 ([ ]).