Cross-Section of the Atlantic Basin at Latitude 12 N extending from Sierra Leone to Barbados

Cross-Section of the Atlantic Basin at Latitude 12 N extending from Sierra Leone to Barbados. This profile was made as a result of sounding taken on the School-Ship MERCURY, a vessel for training orphan boys and delinquent boys in nautical and oceanographic science. The sounding at 45 W indicated the southern extension of the Mid-Atlantic Ridge from the Azores.

Photo Date: 1871