According to the U.S. Geological Survey website, tectonic plates are massive, irregular-shaped slabs of solid rock, composed of oceanic and continental lithosphere. The continental crust is made up of lightweight mineral... More »

Tectonic plates move at the rate of about 1 to 2 inches each year. Tectonic plates can move in various directions, causing them to collide at certain points on Earth and pull away at other points. More »

Continental and oceanic are the two types of tectonic plates. Continental plates tend to be larger than oceanic and bear the majority of a continent's mass. Continental plates tend to be much thicker on average, but less... More »

Geological plates are enormous slabs of solid rock that make up the earth's crust and outermost layer, the lithosphere. They are more commonly referred to as tectonic plates. More »

www.reference.com Science Earth Science Plate Tectonics

Continental and oceanic are the two types of tectonic plates. Continental plates tend to be larger than oceanic and bear the majority of a continent's mass. Continental plates tend to be much thicker on average, but less... More »

The most common rocks on top of oceanic plates are basaltic rocks, which are denser than ones found on continents; these are found on top of the oceanic plates because they are pieces of the oceanic plates that have been... More »

www.reference.com Science Earth Science Layers of the Earth

According to the National Oceanographic and Atmospheric Administration, seafloor spreading is caused by the flow of plastic mantle rock beneath the Earth's oceanic crust. These flows force the seafloor apart, allowing pr... More »