Largest Oil Reserve May Lie Under Northern Plains

April 11, 2008
Largest Oil Reserve May Lie Under Northern Plains

An area of shale and other rock in North Dakota and Montana is estimated to hold the largest potential oil resources in the 48 contiguous states, according to an assessment released Thursday by the United States Geological Survey.

The area, known as the Bakken Formation, might contain 3 billion to 4.3 billion barrels of oil that could be extracted using current technology, the survey said.