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Data sets Publications Expeditions Thesaurus
Gizzard Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Lower Pennsylvanian
 ......Gizzard Group
RTGeorgia
 Tennessee
SNN Georgia and E Tennessee. Added to Thesaurus in 1989.