Goose Lake clay (informal) (IL)
Informal. The rank or lithologic term should not be capitalized.
Pennsylvanian
Named from occurrence near Goose Lake, east Grundy Co., northeastern IL (Wanless, 1939).
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 ([ ]).