Passamari Member of Renova Formation of Bozeman Group (MT)
Passamari Formation (MT)
Tertiary
Oligocene or Miocene
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).
Montana folded belt
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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