Usage:
Gizzard Group (TN*)
Gizzard Formation (GA*-notably in Kingston thrust sheet)
Subunits:
GROUP STATUS (alphabetical) all in TN*: Raccoon Mountain Formation, Signal Point Shale, Warren Point Sandstone.
Geologic age:
Early Pennsylvanian (Bashkirian; Namurian to Westphalian A; early Morrowan)*
Type section, locality, area and/or origin of name:
Type section: in gorge of Big Fiery Gizzard Creek (Gizzard Cove), about 2 mi south of Tracy City, Grundy Co., eastern TN; geographic names used here are those on White City quadrangle, rather than "Little Fiery Gizzard'' of Stafford (Wilson and others, 1956).
AAPG geologic province:
Appalachian 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 ([ ]).