The deep oceans are far from flat. They feature ridges, trenches, seamounts, and valleys, creating a diverse and dramatic ...

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 now fully-developed mid ocean ridge is the site of hot new ocean floor ... In continent-ocean subduction boundaries, this sediment is deposited in the ocean above the trench itself. In ocean-ocean ...

At ocean-ocean convergences, one plate usually dives beneath the other, forming deep trenches like the Mariana ... the giant basins. A single mid-ocean ridge system connects the world's oceans ...

Ridges thrust up from the abyssal plain by tectonic forces can reach thousands of meters in height, and run for hundreds or ...