Petrified Forest Member of Chinle Formation (AZ*,CO*,NM*,NV*,UT*)
(alphabetical): Capitol Reef Bed (UT*), Correo Sandstone Bed (NM*), Sonsela Sandstone Bed (AZ*,NM*).
Named from the Petrified Forest, Navajo and Apache Cos., northeastern AZ (Gregory, 1950).
Black Mesa basin*
Great Basin province*
Plateau sedimentary province*
San Juan basin*
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 ([ ]).