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Gold veins near Great Falls, Maryland
Mining features digitized from Plate 2 of this report. Includes locations of adits, shafts, prospect pits, and trenches.Gold discovered in this area in 1861 was worked sporadically until 1960. |
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Gamma-ray, magnetic, and topographic data for parts of the Colorado Front Range
Five geospatial grids from the NURE surveys, showing potassium, uranium, and thorium concentration, residual magnetic field, and digital elevation. |
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