Usage:
Barrel Spring Formation (CA*)
Barrel Spring Formation of Eureka Group (CA)
Geologic age:
Late Ordovician (late Whiterockian to Mohawkian; late Chazyan to Turinian)*
Type section, locality, area and/or origin of name:
Type section: Mexican Gulch [unnamed on present topo map], first tributary to Mazourka Canyon north of Bonanza Gulch, in Inyo National Forest, Independence 15-min quadrangle, Inyo Co., CA [approx. Lat. 36 deg. 55 min. 54 sec. N., Long. 118 deg. 03 min. 48 sec. W., Mazourka Peak 7.5-min quadrangle] (Phleger, 1933; Ross, 1965; 1966).
Named from exposures along east side of Mazourka Canyon, in Inyo National Forest (Phleger, 1933).
AAPG geologic province:
Great Basin 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 ([ ]).