Gulfian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Gulfian
NTAguja Formation
 Austin Chalk
 Austin Group
 Eagle Ford Formation
 Escondido Formation
 Navarro Group
 Olmos Formation
 Prairie Bluff Chalk
 Taylor Marl
 Woodbine Formation
RTSan Miguel Formation
SNNorth America, provincial series.