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BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Middle Pennsylvanian
 ......Atokan
NTAtoka Formation
RTManakacha Formation
 Watahomigi Formation
SNProvincial series, North America: lower Middle Pennsylvanian. Above Morrowan, below Desmoinesian.