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BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Wahoo Limestone
RTAlaska
 Upper Pennsylvanian
 Upper Mississippian
 Lisburne Group
 Lower Pennsylvanian
SNIn Lisburne Group. Upper Mississippian, Lower Pennsylvanian, and Upper Pennsylvanian. At one time, may have been considered Permian. N Alaska. Indexed with age as applicable. Added to Thesaurus in 1995.