Diagram A and B are both examples of divergent convergent( divergent, convergent ) plate boundaries.

Diagram A is an example of two oceanic contiental( oceanic, contiental ) plates moving apart. Diagram B is an example of two continental oceanic( continental, oceanic ) plates moving apart.

At the plate boundary on diagram A, land is being created destroyed( created, destroyed ) by magma coming up and cooling. The magma comes up to create a long series of volcanoes called a ridge fault trench( ridge, fault, trench ). Earthquakes Volcanoes( Earthquakes, Volcanoes ), in addition to volcanoes, also occur at this plate boundary.

At the plate boundary on diagram B, the thick continental crust is stretching and a rift valley ridge fault volcanic arc( rift valley, ridge, fault, volcanic arc ) is being made. Over time, the rift valley will get wider and deeper. Earthquakes Volcanic Arcs( Earthquakes, Volcanic Arcs ) also occur at this plate boundary.

Digram C is a transform divergent convergent collision convergent subution( transform, divergent, convergent collision, convergent subution ) boundary. Land is not created created( not created, created ) or destroyed at this plate boundary. Strong earthquakes volcanoes( earthquakes, volcanoes ) occur at this plate boundary, and a fault ridge rift valley( fault, ridge, rift valley ) is formed where the crust cracks between the two plates.