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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

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North Dakota officials are looking at local resources to keep fractures for oil wells open and meet a proppant shortage, officials said.

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The North Dakota Geological Survey in Bismarck has completed collecting kaolinite samples from 10 counties in the west, including Stark, Dunn and Morton counties, according to its news publication.

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