Plate Boundaries 😻Lexi Speed😻

Convergent Boundary

The convergent boundaries move towards each other, so the stress is compression. This causes trenches when an oceanic plate collides with a continental plate and mountains when two continental plates collide. On 3/11/11, the most powerful earthquake Japan has ever had hit because of an oceanic plate colliding with a continental plate. This also caused an enormous tsunami. After the earthquake and tsunami, 22,000 people were reported dead and/or missing.

Aftermath of 3/11/11

Divergent boundary

The plates at divergent boundaries move away from each other, which is tension. The plates' spreading causes volcanoes, mid-ocean ridges, and continental rifts. This has also caused the Mid Atlantic Ridge. It's a volcanic mountain chain in the middle of the Atlantic ocean. It has been there for a really long time. Magma comes up through it and creates new ocean floor, and the old ocean floor gets subducted, remelted, and eventually comes back up through the mid-ocean ridge.

transform boundary

The plates at a transform boundary move sideways past each other, which is shear stress. This causes fault lines, which also cause earthquakes. An example of this is the San Andreas Fault in California. At this fault line, the Pacific Plate and North American Plate are sliding past each other, so there are several earthquakes. Scientists believe that there is a huge earthquake that's going to come at any time.

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