Surficial geology of the Ashland quadrangle, Belknap and Grafton Counties, New Hampshire / by Daniel J. Tinkham and John A. Brooks ; digital compilation by Emery & Garrett Groundwater, Inc.
- Relief shown by contours and shading. "Contour interval 20 feet." "Base map (provisional) by U.S. Geological Survey 1987, Ashland, New Hampshire." "Map preparation: surficial mapping completed by Daniel J. Tinkham and John A. Brooks (consulting geologists at Emery & Garrett Groundwater, Inc) during the 2012 field season." "DRAFT." "Surficial geologic map open-file series GEO-096-024000-SMOF." GRANIT Tile no. 96." Includes quadrangle location map, "Representative photographs of the map area", ancillary map "Shaded-relief Digital Elevation Model (DEM) data showing the southeast trending glacial topographic features within the Ashland quadrangle."
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