In regions of convergence, one plate can sink under another in a subduction zone, or two colliding plates can form a mountain belt. At divergent ... investigate a plate boundary in New Zealand ...

Deep trenches appear at these boundaries, caused by the oceanic plate bending downward into ... perhaps to reappear much later at a distant divergent boundary.

When the plate sinks into the mantle it melts to form magma. The pressure of the magma builds up beneath the Earth's surface. The magma escapes through weaknesses in the rock and rises up through ...

Four types of plate tectonic activity are demonstrated in this feature. Keep an eye on the map to see where in the world the activity takes place. Also known as spreading boundary, a divergent ...