Usage:
Gleeson Quartz Monzonite (AZ*)
Geologic age:
Jurassic, Early*
Type section, locality, area and/or origin of name:
Crops out over an area of nearly 30 sq mi, in T. 18 and 20 S., R. 24 and 25 E., in southern part of Dragoon Mountains, and in pediment to south and east of it, central Cochise Co., southeastern AZ. Town of Gleeson is at eastern side of the mass, and the Gleeson-Tombstone Road crosses it near its center (Gilluly, 1956).
AAPG geologic province:
Pedregosa 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 ([ ]).