Usage:
Prewitt Sandstone Member of Morrison Formation (NM)
Geologic age:
Jurassic
Type section, locality, area and/or origin of name:
Type section: west of Mt. Powell, in sec. 9, T. 14 N., R. 13 W., western part of Thoreau quadrangle, McKinley Co., NM. Named from exposures along cliffs north of U.S. Highway 66, north of Prewitt, McKinley Co., NM (Smith, 1954).
AAPG geologic province:
San Juan basin
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 ([ ]).