a segment of the lithosphere.
An area of the earth's crust which moves during geological time resulting in continental drift and other major changes in the topography of the surface of the globe.
Large section of the earth's crust, either oceanic or continental, that is in motion due to forces within the earth. Tectonic activity in Alaska is due to interaction between the Pacific plate, and the North American plate.
a piece of the Earth's crust (or lithosphere )
a piece of the earths crust (or lithosphere)
One of several large, mobile pieces of Earth's lithosphere adjoining other plates along zones of seismic activity.
slabs of the earth's rigid lithosphere, which move independently on top of the asthenosphere. Each of these plates is made up of dense oceanic crust or lighter continental crust. See subduction zone.
A section of the Earth's lithosphere. Each tectonic plate is bounded by oceanic ridges, trenches or mountain chains. The 7 major plates and numerous minor plates link together to form the Earth's surface.
The rigid, outer layer of the Earth is divided into several tectonic plates, each of which s about 100km thick. Tectonic plates move apart at rifts, and converge at subduction zones.
a solid part of the crust that very slowly moves across the surface of a planet
Torsionally rigid, thin segments of the earth's lithosphere that may be assumed to move horizontally and adjoin other plates. It is the friction between plate boundaries that cause seismic activity.
An extensive layer of lithosphere that moves as a discrete unit on the surface of the Earth's asthenosphere.
A large rigid slab of lithosphere, distinguished from neighbouring plates by seismic activity along its edges.