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National Geologic Map Database

Geologic Unit: Gizzard

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).