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Data sets Publications Expeditions Thesaurus
Aldridge Formation  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Mesoproterozoic
 ....Aldridge Formation
RTIdaho
 Montana
 Washington
 British Columbia
 Belt Supergroup
SNIn Belt Supergroup. Added to Thesaurus in 1989.