Georgetown Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Cretaceous
 .....Georgetown Formation
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Comanchean
 .....Georgetown Formation
RTLouisiana
 Texas
 Arkansas
 Washita Group
SNComanchean. In Washita Group. Central and S Texas, Arkansas, Louisiana. This term has multiple hierarchies. Added to Thesaurus in 1993.