Guardian: North Dakota sits on top of the largest continuous oil deposit in the lower 48 states. The Bakken shale formation covers about 200,000 square miles, extending through North Dakota and Montana into the Canadian provinces of Saskatchewan and Manitoba. There are also moves to look for oil in South Dakota, too. The US Geological Survey estimated in 2008 there were 4bn barrels of recoverable oil in the Bakken Formation. Oil company estimates range as high as 24bn barrels. Geologists have known about...
URL: http://www.guardian.co.uk/environment/2012/may/14/north-dakota-riding-oil-rush
Enclosure: http://static.guim.co.uk/sys-images/Guardian/Pix/audio/video/2012/5/14/1337001198934/Williston-North-Dakota-007.jpg
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