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National Geologic Map Database

Geologic Unit: Rochelle

Usage:

Rochelle Conglomerate of Canyon Group (TX)
Rochelle Conglomerate Member of Graford Formation of Canyon Group (TX)


Geologic age:

Pennsylvanian
Permian


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

Type locality: 4 mi east and 1.3 mi north of Rochelle-San Saba Road, near top of prominent escarpment (US geologic names lexicon, USGS Bull. 1200).
Named from its development near Rochelle, McCulloch Co., Colorado River region, central TX (Tarr, 1890).


AAPG geologic province:

Bend arch
Fort Worth syncline
Llano uplift


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).