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National Geologic Map Database

Geologic Unit: Center Hill

Usage:

Center Hill Ash Bed of Dowelltown Member of Chattanooga Shale (TN*)
Center Hill Ash Bed of Pipe Creek Shale Member of Java Formation (subsurface of OH*,PA*,TN*,VA*,WV*)
Center Hill Ash (VA)
[/?] Center Hill Metabentonite (IN,KY,TN)


Geologic age:

Late Devonian (late Frasnian)*


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

At proposed standard locality of Chattanooga Shale, along east approach to Sligo Bridge, DeKalb Co., central TN. Named from exposures near Center Hill Reservoir in DeKalb, Putnam, and White Cos., TN (Conant and Swanson, 1961).


AAPG geologic province:

Appalachian basin*
Cincinnati arch*


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 ([ ]).