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White River Formation

WHITE RIVER FORMATION (AGE 31 TO 35 Ma)--White to pale-pink blocky tuffaceous claystone and lenticular arkosic conglomerate.
State Wyoming
Name White River Formation
Geologic age Phanerozoic | Cenozoic | Tertiary | Oligocene (31-35 Ma)
Comments White River is also included in Tmo
Primary rock type fine-grained mixed clastic
Secondary rock type medium-grained mixed clastic
Other rock types mixed clastic/volcanic
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone (Tuffaceous)
Sedimentary > Clastic > Conglomerate
Map references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Unit references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Counties Albany - Big Horn - Campbell - Carbon - Converse - Crook - Fremont - Goshen - Johnson - Laramie - Natrona - Niobrara - Platte - Sheridan - Sweetwater - Washakie