Plate Boundaries by Ruby Jones

Types of Boundaries

Divergent Plate Boundary

The plates move away from each other. They experience tension. Oceanic divergent plate boundaries create mid-ocean ridges and volcanos. Continental divergent plate boundaries also cause volcanos, as well as continental rifts. Examples of divergent plate boundaries are the Mid-Atlantic Ridge, East Pacific Rise, and the East-African Rift. In December 2005, there was a 6.8 earthquake in Africa under Lake Tanganyika. There were six casualties.

a house effected by the 2005 earthquake
A picture of the Mid-Atlantic Ridge taken by Mathieu Foulquié in Thingvellir Lake
divergent plate boundary example

Convergent Plate Boundary

The plates move towards each other. They experience compression. Continental-continental plate boundaries cause mountains. Continental-oceanic plate boundaries create volcanos. Krakatoa is an example of a volcano created by convergent plates. The volcano erupted in 1883 and it is estimated that it killed more the 36,000 people.

example of convergent plate boundary
example of continental-oceanic convergent plate boundary
"An 1888 lithograph of the 1883 eruption of Krakatoa."

Transform Plate Boundary

Transform plate boundaries slide horizontally. These plate boundaries create fault lines. The stress they experience is shear stress. An example of a popular fault line is the San Andreas fault. In 1906 the San Andreas fault caused an earthquake that was estimated to be 7.8. It killed more than 3,000 people and destroyed more than 28,000 buildings.

transform plate boundary example
San Francisco City Hall after the earthquake
Transform plate boundary example

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