... 58,957 ,25 8 square miles (1 52, 617,160 km2) 13,874 feet (4 ,22 9 m) 35,840 feet (10, 924 m) Mariana Trench 154,960,6 72 cubic miles (643,375,5 52 km3) 11 12 OCEANS When they disappear beneath the sea ... part of the Atlantic Ocean, more than GEOGRAPHY OF THE OCEANS million years ago the Caribbean Sea was also joined to the Pacific The narrow strip of land called the Isthmus of Panama now closes off ... expanse of sea, covering nearly one-third of Earth s surface—more than 16 times the area of the 50 U.S states The Pacific Ocean stretches from the Arctic Ocean boundary near the North Pole to the...