Ridges thrust up from the abyssal plain by tectonic forces can reach thousands of meters in height, and run for hundreds or thousands of miles. The discovery of both trenches and mid-ocean ridges ...

Scientists uncover surprising evidence that the Kerguelen hotspot, responsible for the 5,000-kilometer-long Ninetyeast Ridge, ...

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 ...