Where two oceanic plates converge, subduction generates huge amounts of magma that erupt to form submarine volcanoes, and eventually island arcs.

Question

Quizplus · Accepted Answer

This statement is true. When two oceanic plates converge, one plate is forced beneath the other in a process called subduction. The subducting plate releases water and other volatile substances which lowers the melting point of the mantle above it. The mantle then melts and rises to the surface as magma, which can cause underwater eruptions to form submarine volcanoes. Over time, these volcanoes can continue to erupt and build up to form island arcs.

Where Two Oceanic Plates Converge, Subduction Generates Huge Amounts of Magma