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I-94 closed between Dickinson and Valley City

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February 18, 2012
Press Photo by April Baumgarten
The North Dakota Geological Survey studied kaolinite clay samples this fall in the Dickinson area to see if it could be used for keeping hydraulic fractures open.
The hills have kaolinite: Geological Survey studys clay in western counties
February 18, 2012 - 12:00am
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