To better "see" Precambrian basement geology, a high resolution airborne geophysical survey is currently being carried out over eastern North Dakota!
USGS with North Dakota Geological Survey NDGS.
Part of the national Earth Mapping Resources Initiative (Earth MRI)
RESTON, Va. – The U.S. Geological Survey plans low-level airplane flights over eastern North Dakota and small nearby areas of Minnesota and South Dakota to image geology using airborne geophysical tec...