Bakken formation
Rock formation
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The Bakken Formation is a rock unit from the Late Devonian to Early Mississippian age occupying about 200,000 square miles of the subsurface of the Williston Basin, underlying parts of Montana, North Dakota, Saskatchewan and Manitoba. The... Wikipedia
Area: 200,773 mi²
Coordinates: 48°23′34″N 102°56′24″W / 48.3929°N 102.9399°W
Extent: Williston Basin
Named by: J.W. Nordquist
Named for: Henry O. Bakken (1901-1982)
Other: Sandstone, siltstone
Primary: Shale, dolomite