Usage:
Thunderhead Sandstone of Great Smoky Group of Ocoee Supergroup (NC*,TN*)
Thunderhead Formation of Great Smoky Group of Ocoee Supergroup (NC)
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Named from development on Thunder Head [Thunderhead Mountain], western Great Smoky Mountains, Blount Co., eastern TN, and Swain Co., western NC (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Appalachian basin*
Piedmont-Blue Ridge province*
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 ([ ]).