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National Geologic Map Database

NGMDB

Geologic Unit: Tradewater

Usage:

Tradewater Formation (IL*,KY*)
Tradewater Formation of Raccoon Creek Group (IL,KY)


Subunits:

(alphabetical): [?]Aberdeen Sandstone Member (KY-local), [?]Assumption Coal Member (IL-local), Cedar Creek sandstone lentil (informal) (IL), Ferne Clyffe member (informal) (IL), Grindstaff Sandstone Member (KY*), Lake of Egypt member (informal) (IL), Murray Bluff Sandstone Member (IL), Ozark sandstone lentil (informal) (IL), Pope Creek Coal Member (IL), Reynoldsburg Coal Bed (IL), Sugar Creek sandstone lentil (informal) (IL), Tarter Coal Member (IL*), Tunnel Hill Coal Bed (IL).


Geologic age:

Pennsylvanian, Early*
Morrowan*
Pennsylvanian, Middle*
Atokan*
Desmoinesian*


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

Type locality: along Tradewater River east of Battery Rock, KY (Glenn, 1912).
Reference section (subsurface): Western Kentucky Stratigraphic Test Hole Gil no. 15, Union Co., KY (Tri-State Committee on Correlation of the Pennsylvanian System in the Illinois Basin, 2001).


AAPG geologic province:

Illinois basin*


NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).

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