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Description
Field map of line of soundings offshore from Cape Henlopen, Delaware Bay.In the far SE corner, the break in soundings from 85 fathoms to 145 fathoms isone of the earliest indications of the continental shelf break. (Image credit: NARA C&GS; Colllection)
Credit
NARA C&GS; Colllection
Display Date
1847 ca.
Location
Delaware, Offshore
Collection
Historic Coast & Geodetic Survey
Historic Maps
General
Keywords
Coast and Geodetic Survey
Archive Seafloor Mapping