Usage:
Bird Spring Formation (AZ*,CA*,NV*,UT*)
Bird Spring Group (NV)
Subunits:
GROUP STATUS (alphabetical): Battleship Wash Formation (NV), Indian Springs Formation (NV).
FORMATION STATUS: Indian Springs Member (NV).
Geologic age:
Late Mississippian (Serpukhovian; Chesterian) to early Permian (Kungurian; Leonardian)*
Type section, locality, area and/or origin of name:
Notable exposures in Bird Spring Range and east-central part of Spring Mountains, Goodsprings region, Goodsprings 15-min quadrangle, [Clark Co.], southeastern NV (Hewett, 1931).
AAPG geologic province:
Plateau sedimentary province*
Great Basin province*
Mojave 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 ([ ]).