Question

Which of the following is a source of heat for magma formation? magma plumes in the continental crust friction due to divergence friction due to subduction magma plumes in the oceanic crust

Answer 1

Answer;

Magma plumes in the continental crust

Step-by-step explanation;

• Magma is a very hot liquid that is formed from the melting of rocks in the earth's lithosphere.

• Mantle plumes are columns of hot rock that rise from the Earth's high pressure core to its lower-pressure crust. At the mantle plums decompression melting takes place.
• Decompression melting involves the upward movement of the earth's solid mantle. The hot material rises to an area of lower pressure through convection process. Reduction in pressure, or decompression, enables the mantle rock to melt and form magma.

Answer 2

The answer is; friction due to subduction

In the subduction zone (where tectonic plates collide), when the oceanic plate is being subducted under the continental plate, there is enormous pressure and friction as a result. The pressure causes an increase in temperatures in the region that rise above the melting point of the rocks. The rocks begin to melt and the magma rises and form mountains ranges along the ridge.