![]() Here the thick continental plate is arched upwards from the convection current’s lift, pulled thin by extensional forces, and fractured into a rift-shaped structure. When a divergent boundary occurs beneath a thick continental plate, the pull-apart is not vigorous enough to create a clean, single break through the thick plate material. Effects that are found at a divergent boundary between oceanic plates include: a submarine mountain range such as the Mid-Atlantic Ridge volcanic activity in the form of fissure eruptions shallow earthquake activity creation of new seafloor and a widening ocean basin. When a divergent boundary occurs beneath oceanic lithosphere, the rising convection current below lifts the lithosphere, producing a mid-ocean ridge. At the crest of the uplift, the overlying plate is stretched thin, breaks and pulls apart. ![]() This lateral flow causes the plate material above to be dragged along in the direction of flow. The rising current pushes up on the bottom of the lithosphere, lifting it and flowing laterally beneath it. ![]() This occurs above rising convection currents. 4 Divergent boundaries are associated with zones of tension, they are constructive and contains normal faults as well as mid-ocean ridges, rift and valleys.ĭivergent boundaries are places where plates pull apart from each other. ![]()
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