Blair Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Blair Formation
RTUtah
 Wyoming
 Mesaverde Group
SNIn Mesaverde Group. Underlies Rock Springs Formation and overlies Hilliard Shale. SW Wyoming and NE Utah. Added to Thesaurus in 1989.