Natural aggregates of the conterminous United States

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Description Geologic occurrence of potential sources of crushed stone and sand and gravel for use as natural aggregate. A summary of the natural aggregate industry is also included. Data are provided in Shapefile format.
Originators Langer, William H.
Publication U.S. Geological Survey Bulletin 1594

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Shapefile Plate 1, potential source areas of sand and gravel aggregate.
Shapefile Plate 2, potential source areas of crushed stone aggregate and predominant bedrock types in these areas.