Published February 20, 2013, 09:29 AM
-- Sand mined in southeastern Minnesota and western Wisconsin opens up cracks between rocks so oil and gas can be removed from the ground in places such as North Dakota.
Minnesota News Roundup: Sand mining legislative testimony fractured
Minnesota News-- Sand mined in southeastern Minnesota and western Wisconsin opens up cracks between rocks so oil and gas can be removed from the ground in places such as North Dakota.
By: Don Davis , Pierce County Herald
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