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National Geologic Map Database

Geologic Unit: Indian Bluff

Usage:

Indian Bluff Formation (TN*)


Subunits:

(alphabetical) --all in TN*: Dwale shale (informal, unranked), Elkins Fork shale (informal, unranked), Indian Fork Sandstone Member, Pioneer Sandstone Member, Seeber Flats Sandstone Member, Stockstill Sandstone Member.


Geologic age:

Middle Pennsylvanian (Moscovian; Westphalian; Atokan)*


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

Type section: Cross Mountain, Lake City quadrangle, eastern TN. Named from Indian Bluff on eastern edge of Braden Flats, a short distance northeast of Graves Gap, Anderson Co., eastern TN. Section begins at top of Jellico coal on Militia Hill and ends on top of Pioneer sandstone upon which Mountain View Church is located (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 ([ ]).