Lithosphere: The lithosphere is the rigid outermost shell of a rocky planet defined on the basis of the mechanical properties.
Mid-Oceanic ridge:
A mid-ocean ridge is a general term for an underwater mountain system that consists of various mountain ranges, typically having a valley known as a rift running along its spine, formed by plate tectonics.
A mid-ocean ridge is a general term for an underwater mountain system that consists of various mountain ranges, typically having a valley known as a rift running along its spine, formed by plate tectonics.
Rift valleys:A rift valley is a linear-shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault.
Subduction:In geology, subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge.
Asthenosphere:
The asthenosphere is the highly viscous, mechanically weak and ductilely-deforming region of the upper mantle of the Earth.
The asthenosphere is the highly viscous, mechanically weak and ductilely-deforming region of the upper mantle of the Earth.