constructive plate boundary

this contains constructive plate boundary activities and formation of a shield volcano

At a constructive plate margin the plates move apart from one another. When this happens the magma from the mantle rises up to make (or construct) new land in the form of a shield volcano. The movement of the plates over the mantle can cause earthquakes.

Diagram showing oceanic ridge with erupting lava as tectonic plates move apart, forming new crust. Labels indicate lithosphere and magma.