Ladd Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Ladd Formation
RTCalifornia
 Holz Shale
SNS California. Includes Holz Shale and Baker Conglomerate Member. Added to Thesaurus in 1989.