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__**Convergent Boundaries**__


A Convergent Boundary is where plates serving landmasses collide, and the crust then crumples. As that continues, mountains will grow higher. Convergent Boundaries occur when a plate of ocean dives beneath the other, called subduction. When the overlying plate lifts up, it forms mountain ranges. When the diving plate melts it often spews out into a volcanic eruption. The plates usually dives beneath each other which forms deep trenches. The plate collisions can lead to underwater volcanoes, those volcanoes can eventually turn into island arcs. **Example:** //30 to 50 millions of years in different stages in the Indian Plate has collided with the Eurasian Continental Plate, which eventually formed the Himalaya Mountain.// **Example:** //The Puerto Rico Trench is a trench in the ocean, located on the boundary between the Caribbean Sea and the Atlantic Ocean. This trench is associated with a transition between the subduction zone in the south along the Lesser Antilles island arch and a fault zone/plate boundary that is between Cuba and Hispaniola, that goes through the Cayman Trench to the coast of Central America.// **Example:** //The west side of the Pacific Plate is a convergent boundary that is subducted under the Eurasian Plate in the north and the Philippine Plate in the middle forming the Mariana Trench.//

__**Divergent Boundaries**__


Divergent Boundaries are when the plates slpit apart from eachother. From the magma deep inside the mantle causes it to rise and push apart the two plates. The process renews the ocean floor and widens the basins. A large mountain range connects or goes through all of the oceans. Giant troughs form when plates are tugged apart. If the plates continue to diverge, millions of years from now eastern Africa will split apart. **Example:** //The Arabian Plate in the western boundary is a transform fault zone; the Dead Sea and the East Anatolian faults is where the adjacent plates grind past each other. The rifts of thr Red Sea and the Gulf of Aden constitute the southern boundary, where Arabia and Africa are pulling apart//**. Example**//: The southern side of the Nazca Plate is a divergent boundary with the Antartic Plate, the Chile Rise, where the seafloor spreading permits magma to rise, the western side is also a divergent boundary with the Pacific Plate forming the East Pacific Rise//**. Example**//: The Austrailian Plate movies in a northeast direction, therefore it collides with the western edge of the Philippine Plate. The collision pushes up the ocean floor above sea level, which forms island chains, island arcs, and a twisted sea floor.//

**__Transform Boundaries__**


A transform boundary is when two plates "grind" past each other; strike-slip faults. Transform Boundaries do not produce mountains or oceans. The motion causes large earthquakes. This type of boundary is marked in some linear valleys, where rock has been ground up. Transform boundaries are marked by features such as stream beds, thay has been split in half. Transform boundaries aren'ts marked/shown by surface features. **Example:** //The Caribbean Plate formed the Cayman Trench.// **Example:** //The largest tectonic plate, the Pacific Plate is moving north west relative to the plate that holds North America and relative to the hot sports coming up through the mantle from below the plates. They generate or form islands like Hawaii.// **Example:** //In the year of 1906, there was an earthquake that was caused by transform boundaries in San Francisco, California.//

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__**Citations**__

 * Duennebier, Fred, Dr.. //Reply to ASK-AN-EARTH-SCIENTIST//. Web. 19 Nov. 2009. []
 * Heezen, Bruce , and Marie Tharpe. //Three Tectonic Plates Collide Down Under//. Web. 19 Nov. 2009. [|http://www.platetectonics.com/oceanfloors/australian.asp]
 * Himalaya Mountains. 2000. Web. 19 Nov. 2009. []
 * //Major Tectonic Plate of the World//. Web. 19 Nov. 2009. [|http://www.oceansoftheworld.com/tectonic-plates/pacific-tectonic-plate.html]
 * Nazca Plate. Web. 19 Nov. 2009. []
 * //Plate Tectonics//. 1996-2009 . Web. 19 Nov. 2009. []
 * //Tectonics of the Arabian Plate//. Web. 19 Nov. 2009. []