GEOLOGY

Detailed explanation-1: -Seafloor spreading and other tectonic activity processes are the result of mantle convection. Mantle convection is the slow, churning motion of Earth’s mantle. Convection currents carry heat from the lower mantle and core to the lithosphere . Convection currents also “recycle” lithospheric materials back to the mantle.

Detailed explanation-2: -History of study The phenomenon is known today as plate tectonics. In locations where two plates move apart, at mid-ocean ridges, new seafloor is continually formed during seafloor spreading.

Detailed explanation-3: -Earth is the only planet known to have plate tectonics, where pieces of crust gradually move, collide, and sink back into the mantle through subduction. This crustal recycling system regulates the balance of carbon and other elements between the surface and subsurface and is a major controller of the global climate.