Usage:
Lead Bell Formation of Brigham Group (ID)
Lead Bell Shale (ID*,UT*)
Subunits:
(alphabetical): Cub Tongue (ID*,UT*), Spence Tongue (ID*,UT*).
Geologic age:
middle Middle Cambrian*
Type section, locality, area and/or origin of name:
Type area: along crest of Portneuf Range from north side of Baldy Mountain, west edge of T. 10 S., R. 39 E., Bannock Co., ID (Oriel and others, 1971).
Type section: 0.8 km east of Twin Knobs, in NE/4 SW/4 sec. 7, T. 10 S., R. 39 E., Bancroft quadrangle, Bannock and Caribou Cos., ID (Oriel and others, 1971).
Named from exposures northeast of abandoned Lead Bell Mine, in NE/4 SE/4 SW/4 sec. 18, T. 10 S., R. 3 9 E. (Oriel and others, 1971).
AAPG geologic province:
Idaho Mountains province*
Snake River basin*
Wasatch uplift*
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 ([ ]).