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Sand forum features environmental experts

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Hydraulic fracturing for oil and natural gas is not occurring in Minnesota, but one substance that's vital to the procedure is located in the state.

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"Nationally, silica sand isn't found in very many places," Heather Arends, industrial mineral supervisor with the Minnesota Department of Natural Resources, explained at a local discussion this week. "The source of silica sand is very isolated to Minnesota, Wisconsin."

Some silica sand can also be found in Iowa and Illinois.

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