Retort Phosphatic Shale Member  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Retort Phosphatic Shale Member
RTIdaho
 Utah
 Wyoming
 Montana
 Nevada
 Phosphoria Formation
SNOf Phosphoria Formation. E Idaho, SW Montana, Nevada, NE Utah and W Wyoming. Added to Thesaurus in 1989.