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BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Hunton Group
RTSilurian
 Devonian
 Oklahoma
 Henryhouse Formation
SNSilurian and Devonian. Includes Chimneyhill Limestone, Henryhouse Formation, Haragan Shale, Bois d'Arc Limestone, Frisco Limestone, Kite Group with Haragan and Cravatt formations. SE Oklahoma. Indexed with ages as applicable.