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Data sets Publications Expeditions Thesaurus
Hartshorne Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Middle Pennsylvanian
 ......Desmoinesian
 .......Hartshorne Sandstone
RTOklahoma
 Arkansas
 Krebs Group
SNIn Krebs Group. E Oklahoma and W Arkansas. Added to Thesaurus in 1985.