TYPES OF PLATE BOUNDARIES
BY JACOB SANCHEZ


There are three main types of plate boundaries they are the following:

  • Divergent
  • Convergent
  • Transform


DIVERGENT BOUNDARIES

A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, lava spews from long fissures and geysers spurt superheated water. Frequent earthquakes strike along the rift. Beneath the rift, magma,molten rock rises from the mantle. It oozes up into the gap and hardens into solid rock, forming new crust on the torn edges of the plates. Magma from the mantle solidifies into basalt, that underlies the ocean floor. Now at the divergent boundaries, oceanic crust, made of basalt, is created.

CONVERGENT BOUNDARIES

When two plates come together, it is known as a convergent boundary. The impact of the two colliding plates, cause the edge of one or both plates up into a rugged mountain range, and sometimes bends the other down into a deep seafloor trench. A chain of volcanoes often forms parallel to the boundary. Powerful earthquakes shake a wide area on both sides of the boundary.

TRANSFORM BOUNDARIES

Two plates sliding past each other forms a transform boundary. Natural or human-made structures that cross a transform boundary are split into pieces and carried in opposite directions. Rocks that line the boundary are pulverized as the plates grind along, creating a linear fault valley or undersea canyon. As the plates alternately jam and jump against each other, earthquakes rattle through a wide boundary zone. In contrast to convergent and divergent boundaries, no magma is formed. Now the crust is cracked and broken at transform margins, but is not created or destroyed.

example of convergent boundry
example of divergent boundary
example of transform boundary

video explaining the types of plate boundaries



Comment Stream

2 years ago
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sources cited:

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www.gweaver.net

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oceanexplorer.noaa.gov

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geology12-7.wikispaces.com