These plates are rigid segments that move in relation to one another at one of three types of plate boundaries : Convergent boundaries , at which two plates come together , Divergent boundaries , at which two plates are pulled apart , and Transform boundaries , in which two plates slide past one another laterally .

There are three types of plate boundary : constructive , destructive and transform . At a constructive plate boundary two plates move away from each other , and hot magma -LRB- liquid rock -RRB- is pushed upwards through the cracks . At a destructive plate boundary , two plates move towards each other . At a transform plate boundary , two plates move parallel to each other .
