Usage:
Drummond Mine Limestone Member of Copper Basin Formation (ID*)
Drummond Mine Limestone of Copper Basin Group (ID*)
Geologic age:
Early Mississippian (Kinderhookian)*
Type section, locality, area and/or origin of name:
Type section: west ridge of Star Hope Canyon, from NW/4 NE/4 SE/4 sec. 10, along ridge to SE/4 SE/4 sec. 14, T. 4 N., R. 21 E., Custer and Blaine Cos., ID. Named from Drummond Mine (Paull and others, 1972).
AAPG geologic province:
Idaho Mountains province*
Snake River 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 ([ ]).