The results of marine geophysical surveys by NOAA, Miami and the University of Durham with the Royal Navy in the eastern Caribbean region are presented as maps of the bathymetry, free-air gravity anomaly, Bouguer gravity anomaly and total field magnetic anomaly These maps show in greater detail features which were already known, such as the negative gravity anomaly belt east of the Lesser Antilles, and reveal new features not previously mapped, such as easterly trending anomalies east of the Lesser Antilles and the complicated anomaly pattern of the Aves Ridge. They provide a detailed coverage of the area bounded by latitudes 10°N. and 17°N., and longitudes 57°w. and 65°w.

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