Glen Canyon Group (AZ*,CO*,NV*,NM*,UT*)
Glen Canyon Sandstone (CO*,UT*)
GROUP STATUS (alphabetical): Kayenta Formation (AZ*,CO*,UT*), Moenave Formation (AZ*,NV*,UT*), Navajo Sandstone (AZ*,CO*,NM*,UT*), Wingate Sandstone (AZ*,CO*,NM*,UT*).
Early Jurassic (Sinemurian to Toarcian)*
Not designated. Named from exposures in walls that form the Glen Canyon of the Colorado River, Coconino Co., AZ, and San Juan Co., UT (Gregory and Moore, 1931).
Black Mesa basin*
Great Basin province*
Green River basin*
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 ([ ]).