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 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).