Usage:
Chavez Member of Morrison Formation (NM)
Geologic age:
Jurassic
Type section, locality, area and/or origin of name:
Type section: south of Mt. Powell, in sec. 9, T. 14 N., R. 13 W., west side Thoreau quadrangle, McKinley Co., NM. Named from exposures on a small mesa east of Chaco Canyon Road, about 5 mi north of Chavez Siding on the Atchison, Topeka, and Santa Fe RR (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 ([ ]).