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Data sets Publications Expeditions Thesaurus
Wall Creek Member  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Wall Creek Member
RTWyoming
 South Dakota
 Frontier Formation
SNOf Frontier Formation. E Wyoming and W South Dakota. Added to Thesaurus in 1989.