GREEN RIVER FORMATION
  Thrust belt--Buff laminated marlstone and limestone, brown oil shale, and siltstone.  Includes
     Angelo and Fossil Butte Members.  Tgrw
  Southwest Wyoming--Oil shale, light-colored tuffaceous marlstone, and sandstone.  Tgrw
    Laney Member (age probably about 45 Ma)--Oil shale and marlstone.  Tgl
    Wilkins Peak Member (age about 49 Ma)--Green, brown, and gray tuffaceous sandstone, shale,
     and marlstone; contains evaporites in subsurface sections.  Tgw, Tgwt
    Tipton Shale Member or Tongue--Oil shale and marlstone.  Tgt, Tgwt
    Fontenelle Tongue or Member--Oil shale, marlstone, limestone, and siltstone; occurs
     along Green and New Fork Rivers and on west side of Green River Basin from T. 33 N.
     south to and lensing out in T. 17 N.  Twg
    Luman Tongue--Oil shale, carbonaceous shale, and sandstone.  Tglu
GRANITIC CONGLOMERATE ABOVE OR IN UPPER PART OF WASATCH FORMATION--Giant granite boulders in 
     arkosic sandstone matrix.  Occurs along west margin of Wind River Range.  Tgc
WASATCH FORMATION
  Thrust belt-Variegated mudstone and sandstone.  Includes Tunp and Bullpen Members, other
     tongues and unnamed members, and main body.  Tgrw
    Diamictite and sandstone--Diamictite grades laterally into other members of the
     formation.  Twd
    Main body--Variegated red to gray, brown, and gray mudstone and sandstone; conglomeratic
     lenses.  Tw
  Southwest Wyoming--Drab to variegated claystone and siltstone, carbonaceous shale and
     coal, buff sandstone, arkose, and conglomerate.  In northwestern part of Green River
     Basin is thick arkosic light-yellowish-tan sandstone intertonguing with pale-green to 
     gray claystone and shale.  Tw
    Cathedral Bluffs Tongue--Variegated claystone and lenticular sandstone; conglomeratic
     near south margin of Wind River Range.  Twc
    New Fork Tongue--Dull-red and green mudstone, brown sandstone, and thin limestone
     beds, merging southward in T. 23 N. with other units.  Twg
    Niland Tongue--Brown sandstone, carbonaceous shale, and coal.  Twn
    Main body--Drab sandstone, drab to variegated claystone and siltstone; locally derived
     conglomerate around basin margins.  Lower part is Paleocene.  Twm
    La Barge and Chappo Members--Red, gray, and brown mudstone and conglomerate and
     yellow sandstone.  La Barge Member tongues out to north at about T. 35 N.  Lower part
     of Chappo is Paleocene.  Twlc
  East Wyoming--Drab sandstone and drab to variegated claystone; numerous coal beds in
     lower part.  Tw
    Moncrief Member--Conglomerate of Precambrian clasts, interbedded with drab sandstone
     and claystone.  Twmo
    Kingsbury Conglomerate Member--Conglomerate of Paleozoic clasts, interbedded with drab
     sandstone and variegated claystone.  Twk
TRANSITIONAL UNIT BETWEEN BATTLE SPRING AND WASATCH FORMATIONS--
     Contains interbedded lithologies of Battle Spring and Wasatch Formations.  Tbw
BATTLE SPRING FORMATION--Equivalent to, and lithologically similar to locally
     derived basin-margin conglomerate of Wasatch Formation; merges southward into
     main body of Wasatch Formation.  Lower part is Paleocene.  Tbs