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B. J. Drenth

High-resolution map of magnetic field variations in Minnesota showing details of the geology underlying glacial deposits.
Posted inScience Updates

Finding the Gaps in America’s Magnetic Maps

by B. J. Drenth and V. J. S. Grauch 16 April 20194 October 2021

A 2017 executive order mandated a plan to evaluate U.S. access to critical mineral resources, but the airborne magnetic survey maps that support this effort are sadly out of date.

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