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.
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Famous quotes containing the word oil:
“Is a park any better than a coal mine? What’s a mountain got that a slag pile hasn’t? What would you rather have in your garden—an almond tree or an oil well?”
—Jean Giraudoux (1882–1944)