Airborne gamma-ray spectrometry. Low-altitude aeromagnetic profiles, gravity measurements, Landsat MSS and U-2 photography, and geologic and topographic maps. Data transformed from vector space to raster space (a two-dimensional image array) with fixed resolution and array dimension, covering 0.3 degrees latitude and longitude. The individual data sets were displayed as black and white continuous tone images, color coded to form color contour maps, or manipulated to generate shaded-relief models.--Modified journal abstract.

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