Usage:
Tygett Sandstone Member of Clore Formation (IL)
Tygett Member of Clore Formation (KY)
Geologic age:
Late Mississippian (Serpukhovian; late Chesterian)*
Type section, locality, area and/or origin of name:
Type section: on south bank of Bradshaw Creek, 0.4 mi southeast of Water Valley School and 1.5 mi north of Tygett School, near center NE/4 NW/4 sec. 24, T. 11 S., R. 1 W., Carbondale quadrangle, Union Co., IL (Swann, 1963).
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 ([ ]).