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National Geologic Map Database

Geologic Unit: Al Rose

Usage:

Al Rose Formation of Mazourka Group (CA*)


Geologic age:

late Early Ordovician (late Ibexian; Blackhillsian)*


Type section, locality, area and/or origin of name:

Type section: on spur along east wall of Mazourka Canyon; top of composite section is 6,000 ft. S. 70 deg. E. from southeast corner sec. 36, T. 11 S., R. 35 E., Inyo Co., eastern CA. Named from exposures east of Al Rose Canyon, a tributary to Mazourka Canyon, Inyo Mountains, Independence 15-min quadrangle, Inyo Co., CA (Ross, 1963).


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).