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National Geologic Map Database

Geologic Unit: Passamari

Usage:

Passamari Member of Renova Formation of Bozeman Group (MT)
Passamari Formation (MT)


Geologic age:

Tertiary
Oligocene or Miocene


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

Not designated. An Indian name meaning stinking water, which refers to what was called Passamari River and is now called Ruby River, Madison Co., MT (Becker, 1961).


AAPG geologic province:

Montana folded belt


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 ([ ]).