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Geologic units containing oil shale

Colorado

Green River Fm--Laney Member (Phanerozoic | Cenozoic | Tertiary)

Claystone, oil shale, and sandstone; in Sand Wash basin

Green River Fm--Parachute Creek Member (Phanerozoic | Cenozoic | Tertiary)

Parachute Creek Member--Oil shale, marlstone, and siltstone; in Piceance basin

Green River Fm--Tipton Tongue (Phanerozoic | Cenozoic | Tertiary)

Claystone and oil shale; in Sand Wash basin. In extreme northwest includes rocks of Wilkins Peak Member

Montana

Permian, undifferentiated (Phanerozoic | Paleozoic | Permian)

Permian, undifferentiated: chert, sandstone, limestone, quartzite, and shale with rock phosphate mostly at base; mainly Phosphoria formation

Permian, undifferentiated (Phanerozoic | Paleozoic | Permian)

Permian, undifferentiated: chert, sandstone, limestone, quartzite, and shale with rock phosphate mostly at base; mainly Phosphoria formation

Nevada

Sedimentary rocks (Late Cretaceous to Oligocene)

SEDIMENTARY ROCKS-Includes Sheep Pass Formation (Eocene) and related units and unnamed tuffaceous sedimentary rocks

Utah

Tertiary (2) sedimentary rocks in central Utah (Eocene)

Tertiary (2) sedimentary rocks in southwestern Utah (Eocene)

Tertiary (2) sedimentary rocks in Uinta Mountains-Uinta Basin region (Eocene)

Wyoming

Green River and Wasatch Formations (Phanerozoic | Cenozoic | Tertiary | Eocene)

GREEN RIVER AND WASATCH FORMATIONS -- in Thrust Belt: GREEN RIVER FORMATION--Buff laminated marlstone and limestone, brown oil shale, and siltstone. Includes Angelo and Fossil Butte Members. WASATCH FORMATION--Variegated mudstone and sandstone. Includes Tunp and Bullpen Members, other tongues and unnamed members, and main body (variegated red to gray, brown, and gray mudstone and sandstone; conglomerate lenses); in southwest Wyoming -- GREEN RIVER FORMATION--Oil shale, light-colored tuffaceous marlstone, and sandstone. WASATCH FORMATION--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.

Green River Formation: Fontenelle Tongue or Member [NONE ON MAP] (Phanerozoic | Cenozoic | Tertiary | Eocene)

WASATCH AND GREEN RIVER FORMATIONS: New Fork Tongue (dull-red and green mudstone, brown sandstone, and thin limestone beds, merging southward in T. 23 N. with other units) of Wasatch and 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.) of Green River.

Green River Formation: Laney Member (Phanerozoic | Cenozoic | Tertiary | Eocene)

GREEN RIVER FORMATION Laney Member (age probably about 45 Ma)--Oil shale and marlstone.

Green River Formation: Luman Tongue (Phanerozoic | Cenozoic | Tertiary | Eocene)

GREEN RIVER FORMATION Luman Tongue--Oil shale, carbonaceous shale, and sandstone.

Green River Formation: Tipton Shale Member or Tongue (Phanerozoic | Cenozoic | Tertiary | Eocene)

GREEN RIVER FORMATION Tipton Shale Member or Tongue--Oil shale and marlstone.

Green River Formation: Wilkins Peak Member and Tipton Shale member or Tongue (Phanerozoic | Cenozoic | Tertiary | Eocene)

GREEN RIVER FORMATION Wilkins Peak Member (age about 49 Ma) (green, brown, and gray tuffaceous sandstone, shale, and marlstone; contains evaporites in subsurface sections) and Tipton Shale Member or Tongue (oil shale and marlstone).

Tatman Formatin (Phanerozoic | Cenozoic | Tertiary | Eocene)

TATMAN FORMATION--Drab nontuffaceous claystone, oil shale, lignite, and sandstone.