Green River Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Green River Formation
RTUtah
 Wyoming
 Colorado
 Flagstaff Formation
 Lake Gosiute
 Laney Shale Member
 Parachute Creek Member
 Wilkins Peak Member
SNLower and middle Eocene. Subdivided into Tipton Tongue, Laney Shale Member, and Morrow Creek Member. NW and central W Colorado, E Utah, and SW Wyoming.