Usage:
Signal Point Shale of Gizzard Group (TN*)
Geologic age:
Early Pennsylvanian (Bashkirian; Westphalian A; early Morrowan)*
Type section, locality, area and/or origin of name:
Type locality: on TN Highway 8, east of Signal Point and just south of town of Signal Mountain, Chattanooga quadrangle, Hamilton Co., eastern TN (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 ([ ]).