Usage:
Marshall Butte Member of Sheep Crossing Formation (AZ)
Geologic age:
Tertiary
Miocene
Type section, locality, area and/or origin of name:
Type section: in White Mountains, at Marshall Butte, Lat. 33 deg. 48 min. 30 sec. N., Long. 109 deg. 46 min. 30 sec. W., Corn Creek Plateau quadrangle, Apache Co., AZ. Named from Marshall Butte (Merrill and Pewe, 1977).
AAPG geologic province:
Black Mesa basin
Basin-and-Range 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 ([ ]).