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 is one of the earliest indications of the continental shelf break.
Photo Category: Coast and Geodetic Survey - Archive Seafloor Mapping
Photo Location: Delaware, Offshore
Photo Date: 1847 ca.
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| Added On | 16th October 2015 |
| Viewed | 5 viewed |
