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National Geologic Map Database

Geologic Unit: Chimneyhill

Usage:

Chimneyhill Limestone (OK*)
/Chimneyhill subgroup [informal] of Hunton Group (OK)

["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). Chimneyhill subgroup considered informal and should not be capitalized.]


Geologic age:

Late Ordovician to Silurian*


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

At confluence of three small creeks, in sec. 4, T. 2 N., R. 6 E., Pontotoc Co., OK (Reeds, 1911).


AAPG geologic province:

Arkoma basin*
South Oklahoma folded belt


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 ([ ]).