EarthWorks Geospatial Catalog

Surficial geologic map of the Loudon Quadrangle, Merrimack and Belknap counties, New Hampshire / by Richard Goldsmith, 1997; New Hampshire Department of Environmental Services ; prepared in cooperation with the U. S. Geological Survey, State Map Program.

"Based from U. S. Geological Survey, 1987. Geology mapped 1997."
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