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 ...
06:32
World in Motion: Plate Boundaries and Plate Movement
Whether studying earthquakes, volcanoes, or other geologic events, scientists usually focus their attention on plate boundaries and plate movement.
02:05
World in Motion: Earthquakes and Plate Tectonics
With the advent of plate tectonics, it's become apparent that episodes of extreme geologic upheaval--like earthquakes--are much more than simply random events.