P6+OceanBasins

*Ocean Basins are formed by the continets spreading apart through subsequent drift. *All of the ocean basins were formed from volcanic rock that was released from fissures located at the mid-oceanic ridges. *Most of the general information concerning the depths of the ocean basins were made after World War 1 when the echo sounder was developed for military purposes.
 * Ocean Basins occupy more than 76% of the total ocean area.