That ridge, it was later discovered, extended through the major oceans of the world. It is now called the Mid-Ocean Ridge. In 1953, American physicists Maurice Ewing (1906-1974) and Bruce Heezen ...

The basement was formed about 60 million years ago at the mid-ocean ridge crest, and the uplift of the ridge and opening of Kings Trough occurred about 27 million years ago.

These zones include: the Pacific Ring of Fire around the Pacific Ocean the Mid-Atlantic Ridge, a mid-ocean ridge that extends along the floor of the Atlantic Ocean southern Europe There are ...