Plate Boundries By Monisha Biswa

Divergent Plate Boundry

Divergent boundaries forms when two plates separate. The mid-Atlantic Ridge erupts lava, which then cools and hardens, moving the continents away from the mid atlantic ridge and closer together. This causes tension. In the ocean the divergent boundary creates volcanos, but because the continental plates are thicker, it creates rift valleys.

This is the East African Rift Valley. It started forming 20-25 million years ago. It is a separation of the Somali Plate and the Nubian Plate. The rift widens at a rate of 6-7 mm annually.

Convergent Plate Boundary

Convergent boundaries are formed when plates collide with each other. The denser plate sinks below the more buoyant plate, this process is called subduction. When an oceanic and Continental plate collide, the oceanic plate subducts under the continent, forming volcanoes. If two continental plates collide, the compression forms mountains.

This is Mount Everest, the tallest mountain on land (The mountain underwater called Mauna Kea is taller). Mount Everest is located on the borders of China, India, and Nepal. It began forming around 60 million years ago, when the Indian plate collided with the Eurasian plate. Mount Everest grows about 4mm each year.

Transform Plate Boundary

Transform boundaries form when two plates slide past each other. When the two plates are moving past each other, they sometimes get stuck and stop moving. Stress starts to build up in the place that they're stuck. When the stress gets to be too much, the rocks break (like my spirit) causing earthquakes.


Created with images by stokpic - "hands world map"

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