Usage:
Jacobs Ranch Formation (AZ)
Geologic age:
Cretaceous(?)
Type section, locality, area and/or origin of name:
Type section: on east side of Tom-and-Cull Wash and along base of ridge separating Tom-and-Cull and Cottonwood Washes, in secs. 5, 6, and 7, T. 37 N., R. 15 W., and sec. 32, T. 38 N., R. 15 W., Mohave Co., AZ. Named from ranch in area (Moore, 1972).
AAPG geologic province:
Plateau sedimentary province
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 ([ ]).