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National Geologic Map Database

Geologic Unit: Graves Gap

Usage:

Graves Gap Formation (TN*)


Subunits:

(alphabetical) --all in TN: Armes Gap Sandstone Member*, Roach Creek Sandstone Member* or Roach Creek Sandstone (unranked).


Geologic age:

Middle Pennsylvanian (Moscovian; Westphalian; Atokan)*


Type section, locality, area and/or origin of name:

Type locality: Cross Mountain, Lake City quadrangle, Anderson Co., eastern TN. Section begins with top of Pioneer sandstone at Mountain View Church and ends at top of Windrock coal about 80 feet above Cumberland Mountain Church. Named from Graves Gap on State Highway 116 in southwestern part of quadrangle (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 ([ ]).