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BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Comanchean
NTAntlers Sands
 Bisbee Group
 Buda Limestone
 Comanche Peak Limestone
 Edwards Formation
 Fredericksburg Group
 Georgetown Formation
 Glen Rose Formation
 Mentor Beds
 Mural Limestone
 Paluxy Formation
 Pearsall Formation
 Rodessa Formation
 Sunniland Limestone
 Travis Peak Formation
 Trinity Group
 Washita Group
UFComanchian
RTLower Cretaceous
 Upper Cretaceous
SNProvincial series, North America. Below Gulfian. Indexed with Lower Cretaceous or Upper Cretaceous as applicable.