Oil Shale
The Green River Formation contains the largest oil shale deposits in the world. The 213 billion tons of oil shale contain an estimated 3 trillion US barrels of shale oil, up to half of which is estimated as recoverable or about equal to all the entire world's proven reserves.
Read more about this topic: Green River Formation
Famous quotes containing the word oil:
“I bade, because the wick and oil are spent
And frozen are the channels of the blood....”
—William Butler Yeats (1865–1939)