Tuesday, April 7, 2009

Convergent and Divergent Boundaries



Convergent and divergent boundaries are places where giant plates, or tectonic plates on the earth's crust that come together or pull apart. Volcanoes or mountains are formed when these plates converge or diverge. New land is formed at divergent boundaries. As the plates come apart, a small section of land is left between them. The block will sink into the asthenosphere and create a rift. Magma will seep upward in between the cracks of the diverging plates. Therefore, new land is formed. At convergent boundaries, mountain ranges and earthquakes form. While the edge of the continental plate folds, the oceanic plate slides under, deep into the earth's mantle. This creates a trench, which causes the rocks in the plates to break, causing earthquakes.

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