When the plates are moving apart.
on the top of the crust, so it can be absorbed into the crust.
new crust forms at divergint bounderies where plates move apart magma oozes up and cools down and creates new crust and the old crust moves away and sucks in the earth
Older material
Transform Boundaries don't destroy or create new crust(:
Divergent boundaries -- where new crust is generated as the plates pull away from each other.Convergent boundaries -- where crust is destroyed as one plate dives under another.Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.Plate boundary zones -- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
They create new crust.
on the top of the crust, so it can be absorbed into the crust.
new crust forms at divergint bounderies where plates move apart magma oozes up and cools down and creates new crust and the old crust moves away and sucks in the earth
Older material
Transform Boundaries don't destroy or create new crust(:
Divergent boundaries -- where new crust is generated as the plates pull away from each other.Convergent boundaries -- where crust is destroyed as one plate dives under another.Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.Plate boundary zones -- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
Most volcanoes form at either convergent or divergent plate boundaries. Volcanoes at convergent plate boundaries form when one plate slides under another, taking seawater with it. This causes the rock in the mantle to melt as the melting point drops. This new magma can rise to form volcanoes.At divergent plate boundaries the crust is thing, which lowers pressure on the mantle, causing some material to melt.
Divergent boundaries create new crust.
Divergent plate boundary.
Yes, of course.
You could find subduction zones in the depths of the oceans, at some plate boundaries. At this location, you would observe one tectonic plate (a plate of lower density then the other) being slipped under another plate into magma. These are also known as destructive boundaries, because crust is being destroyed, (as opposed to diverent boundaries where leaking magma creates new crust.)
near ocean trenches.