Describe the geological processes that occur in a subduction zone
A tectonic plate is made up of all crust or the outer layer of the earth and a skinny upper layer of the mantle, this is then called lithosphere. When an oceanic lithosphere comes across a continental lithosphere in a subduction zone, the oceanic lithosphere always goes beneath the continental plate. One plate descends under another and converts into a thick layer of mantle, called the asthenosphere. A subduction zone can be found in the Ring Of Fire, the Pacific Ocean.
Seafloor spreading -