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This data release is a re-release of an airborne geophysical survey carried out for the United States Geological Survey (USGS) by Spectra Exploration Geoscience Corp., from November 2000 to February 2001. The purpose of this survey was to acquire high-resolution, high-sensitivity aeromagnetic data over an area in northeast and north-central North Dakota and assess the area for anomalies and magnetic features pertaining to the local geology. To achieve this purpose, the survey area was systematically traversed by an aircraft carrying geophysical instruments along parallel flight lines (traverses) spaced 0.25 miles (400 meters) apart in an east-west alignment. Tie lines were flown normal to the traverses spaced at...


map background search result map search result map Cottonwood Lake Study Area - Wetland Identifier Points Cottonwood Lake Study Area-Wetland Vegetation Zones-1975 Cottonwood Lake Study Area-Wetland Vegetation Zones-1977 Cottonwood Lake Study Area-Wetland Vegetation Zones-1979 Cottonwood Lake Study Area-Wetland Vegetation Zones-1980 Cottonwood Lake Study Area-Wetland Vegetation Zones-1981 Cottonwood Lake Study Area-Wetland Vegetation Zones-1983 Cottonwood Lake Study Area-Wetland Vegetation Zones-1986 Cottonwood Lake Study Area-Wetland Vegetation Zones-1987 Cottonwood Lake Study Area-Wetland Vegetation Zones-1988 Cottonwood Lake Study Area-Wetland Vegetation Zones-1990 Cottonwood Lake Study Area-Wetland Vegetation Zones-1991 Cottonwood Lake Study Area-Wetland Vegetation Zones-1993 Cottonwood Lake Study Area-Wetland Vegetation Zones-2000 Cottonwood Lake Study Area-Wetland Vegetation Zones-2001 Cottonwood Lake Study Area-Wetland Vegetation Zones-2005 Cottonwood Lake Study Area-Wetland Vegetation Zones-2009 Cottonwood Lake Study Area-Wetland Vegetation Zones-2010 Cottonwood Lake Study Area-Wetland Vegetation Zones-2012 Airborne magnetic survey over northeast North Dakota, 2000-2001 Cottonwood Lake Study Area-Wetland Vegetation Zones-1977 Cottonwood Lake Study Area-Wetland Vegetation Zones-1981 Cottonwood Lake Study Area-Wetland Vegetation Zones-1986 Cottonwood Lake Study Area-Wetland Vegetation Zones-1987 Cottonwood Lake Study Area-Wetland Vegetation Zones-1991 Cottonwood Lake Study Area-Wetland Vegetation Zones-1988 Cottonwood Lake Study Area-Wetland Vegetation Zones-1983 Cottonwood Lake Study Area-Wetland Vegetation Zones-1980 Cottonwood Lake Study Area - Wetland Identifier Points Cottonwood Lake Study Area-Wetland Vegetation Zones-1990 Cottonwood Lake Study Area-Wetland Vegetation Zones-1993 Cottonwood Lake Study Area-Wetland Vegetation Zones-2010 Cottonwood Lake Study Area-Wetland Vegetation Zones-2000 Cottonwood Lake Study Area-Wetland Vegetation Zones-2012 Cottonwood Lake Study Area-Wetland Vegetation Zones-2005 Cottonwood Lake Study Area-Wetland Vegetation Zones-2009 Cottonwood Lake Study Area-Wetland Vegetation Zones-2001 Airborne magnetic survey over northeast North Dakota, 2000-2001