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National Geologic Map Database

Geologic Unit: Rock Hill

Usage:

Rock Hill Limestone Member of Chico Ridge Limestone of Canyon Group (TX)
Originally spelled Rockhill.


Geologic age:

Late Pennsylvanian (Missourian)


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

It forms the flat top of the long, narrow ridge [locally called Rock Hill or Rockhill Range] that extends southwest from south end of Lake Bridgeport dam, [Bridgeport West 7.5-min quadrangle], Wise Co., central northern TX (Bose, 1918; Scott and Armstrong, 1932).


AAPG geologic province:

Fort Worth syncline


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 ([ ]).