SEDIS - Thesaurus
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Belt Sup
Belt Supergroup
BT
Chronostratigraphic Units
.
Precambrian
..
Proterozoic
...
Mesoproterozoic
....
Belt Supergroup
RT
Idaho
Montana
British Columbia
Altyn Limestone
Aldridge Formation
Ravalli Group
Bonner Formation
Disturbed Belt
Empire Formation
Helena Formation
Missoula Group
Mount Shields Formation
Newland Limestone
Prichard Formation
Revett Quartzite
Saint Regis Form
SN
Comprises Piegan Group, Missoula Group, and Ravalli Group.
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