Convergent (Destructive) Boundary

A **convergent (destructive) boundary** is formed when two plates are moving against each other. The more dense, leading edge of oceanic plate weight down the rest of the plate and into **asthenosphere**, forming **subducation zone**. Asthenosphere is the most elavated layer of mantle, created of deformed rocks, which range from depth of 100 to 700 kilometres. The interaction of the plates creates an **acretionary wedge**, a sediment mass along a plate boundary formed by material deformation. When oceanic plate sinks more than 100 kilometres, high pressure and heat release gases which melt mantle. New formed magma is being forced towards the surface, solidifying mostly in undeground magma chambers.