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.