Usage:
Martin Bridge Formation (ID)
Martin Bridge Limestone (ID*,OR*,WA*)
Martin Bridge Formation of Seven Devils Group (ID,OR)
Martin Bridge Limestone of Seven Devils Group (ID,OR)
Geologic age:
Triassic, Late*
Type section, locality, area and/or origin of name:
Not designated. Named from Martin Bridge, Baker Co., OR (Ross, 1938).
AAPG geologic province:
Snake River basin*
Idaho Mountains province*
Eastern Columbia 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 ([ ]).