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BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Cretaceous
 .....Antlers Sands
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Comanchean
 .....Antlers Sands
RTOklahoma
 Texas
 Trinity Group
SNIn Trinity Group. SW Oklahoma and NE Texas. This term has multiple hierarchies.