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Data sets Publications Expeditions Thesaurus
Krebs Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Middle Pennsylvanian
 ......Desmoinesian
 .......Krebs Group
RTMissouri
 Oklahoma
 Kansas
 Boggy Shale
 Hartshorne Sandstone
 Savanna Formation
SNCentral and NE Oklahoma, SE Kansas and W Missouri. Added to Thesaurus in 1985.