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Data sets Publications Expeditions Thesaurus
Womble Shale  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Womble Shale
RTOklahoma
 Arkansas
SNLower and Middle Ordovician. W Arkansas and S Oklahoma. Overlies Blakely Formation; underlies Bigfork Formation. Added to Thesaurus in 1989.