EVERYDAY SCIENCE

Detailed explanation-1: -Oceanic crust is composed mainly of basalt. Continental crust is composed mainly of granite. Why does oceanic crust generally tend to subduct under continental crust when plates collide? The oceanic crust is thicker than the continental crust.

Detailed explanation-2: -This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly composed of basalt. Continental crust is less dense, thicker, and mainly composed of granite.

Detailed explanation-3: -When an oceanic plate converges with a continental plate, the oceanic crust will always subduct under the continental crust; this is because oceanic crust is naturally denser. Convergent boundaries are commonly associated with larger earthquakes and higher volcanic activity.

Detailed explanation-4: -The melted basalt is combined with melted ocean sediments that have accumulated in layers on top of the basalt as well as parts of the lighter continental crust. This lava that does not reach the surface is granite. Granite is much lighter than basalt. Oceanic crust comes directly from the mantle is much more dense.

Detailed explanation-5: -As long as subduction occurs, water is released and is delivered to the base of the crust, melting pre-existing basaltic rock to form granite magma. As it rises and cools, the granite magma crystallises to continental crust.