02:06
Look Out Below: Tsunami and Tectonic Events
Tsunami are usually the product of a tectonic event, such as an earthquake. They most commonly take place in the Pacific Rim region, because of the relatively higher frequency of large, shallow earthquakes in this area.
02:56
World in Motion: Seamounts, Guyots and Island Arcs
Seamounts, guyots and island arcs form on the ocean floor as a result of a hot spot or mantle plume. While seamounts do not extend above the ocean surface, a guyot is tall enough to be eroded by wave activity and therefore has a flat top. An island ...
05:54
World in Motion: Heat, Convection and Plate Tectonics
Most scientists believe heat and convection probably play a major role in plate tectonics. And, yet, many questions remain.