The Green River basin of Wyoming contains oil shales of considerable value in the Lower Laney and Tipton members of the Green River formation, with the best oil shales in the Tipton with some depths exceeding 1500'in the south-eastern portion of the basin. From data obtained by field work and the drilling of six wells by Union Pacific it is estimated that there are 435 square miles of Union Pacific land containing 55 billion barrels of shale oil in beds with an average content of 10 GPT or more. Where the oil content averages 20 GPT or more there are 300 square miles beneath Union Pacific lands containing at least 30 billion barrels.
