Mod+1+-+Courtney+B

=__Convergent Boundary__=



A convergent boundary is when two plates collide or when one plate dives under another. About 55 million years ago India and Asia crashed into each other and formed the Himalayas. The Himalayas stretch 1600 miles across Asia from the Indus River to Brahmapyta. Another convergent boundary is the Pacific Plate in South America. This plate moves west towards the North America and it rotates arounfd the point of Australia. When one plate dives under another, under water, they form trenches like the Marina trench in North Pacific Ocean. The Marina trench is the deepest point on Earth. Convergent boundaries can lead to volcanoes also.

=__Divergent Boundaries__=



A divergent boundary occurs when two plates pull apart from each other. Divergent boundaries form mountains and volcanoes. One divergent boundary is the Great Rift Valley. Due to this boundary, in millions of years eastern Africa will split from the rest if the content. Another plate is the African Plate. The African Plate causes earthquakes and volcanoes. The Ring of Fire is where 90% of earths volcanoes are located. About 1,900 volcanoes on Earth are active. When divergent boundaries spilt magma is pushes up.

=__Transform Boundaries__= ==

Transform boundaries, also called strike-slip faults, are two plates that grind past each other. An example of a transform boundary is the disaster in San Fransico, this happened in 1904. Another example is the San Andreas Fault in California. One other example is Loma Prieta in San Fransico in 1989. No major landforms are made only earthquakes. There is an earthquake measuring system. The measurments are called Siezmic Waves.

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