First attempt at a bathymetric map by Matthew Fontaine Maury

First attempt at a bathymetric map by Matthew Fontaine Maury. Showed vast relatively shoal area in Mid-Atlantic Grave. Source: In The Physical Geography of the Sea 1855 by M. F. Maury. Courtesy of NOAA Photo Library. Citation: In The Physical Geography of the Sea 1855 by M. F. Maury. Published by Harper and Brothers, New York. p. 209.

via NOAA Ocean Explorer: Bathymetric Map of Mid-Atlantic Region.