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https://www.noaa.gov/media/digital-library-photo/pl23cgs05062jpgDescription
Title block to Offshore Soundings south of Cape Henlopen. Thesewere among the first offshore soundings to show the continental shelf break. (Image credit: NARA C&GS; Colllection)
Credit
NARA C&GS; Colllection
Display Date
1847
Location
Delaware, Offshore
Collection
Historic Coast & Geodetic Survey
Historic Maps
General
Keywords
Coast and Geodetic Survey
Archive Seafloor Mapping
Seafloor Mapping