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Convergent Boundaries



Convergent boundaries is when the land masses collide and one pushes under the other. There are three sub types. They are oceanic-continental, oceanic-oceanic, and the last one is continental-continental. Oceanic-oceanic makes trenches. For instance the Mariana trench. the mariana trench was formed from the Pacific and Philippine Plates smashing together. They also form under water volcanoes. Oceanic-continental form beaches.That is like continental-continental which forms on land volcanoes. The Himalayas were formed by continental-continental. The Euarsian and Indian Plates rammed together forming this monstrous mountain. This mountain is still growing and is the tallest mountain in the world. it grows a fourth of an inch each year.

The Himalayas were formed when Asia and India crashed together and one went under and the other went over.

Transform Boundaries

Transform Boundaries are made by grinding together up and down or side to side.

Transform Boundaries trigger earthquakes. They don't make mountains or oceans. Transform Boundaries form faults because all the pressure cracks the land masses. The San Andreas Fault in California was made by Transform Boundaries. The two plates that formed the San Andreas Fault were the Pacific and North American Plates. In 1906, San Francisco had an earthquake caused by Transform boundaries.

The Malokai Fracture Zone is another example. It is formed from the Cocos and Nazca Plates. The Muray Fracture Zone is another example. It is fromed from the pacific and Juan De Fuca Plates. Faults and fracture zones are often found in the ocean floor because of Transform Boundaries. The fractures are typically zig zag. Transform Boundaries have the nick name of the eighth grade dance move.

Divergent Boundaries

Divergent Boundaries are land masses that spread apart. Magma rises deep from in the earth and spreads the land forming Divergent Boundaries. Mountains and volcanoes rise along the seam of the boundary. That process renews the ocean floor and widens basins. One mid-ocean line connects all the oceans in the world. Giant troughs form where plates are tugged apart.



Mid-Atlantic Ridge spreads from the Arctic Ocean to beyond the southern tip of Africa. The red Sea is an example of divergent boundaries. It was formed when Saudi Arabia was pulled away from the African continent. the Indian Ocean was fromed the same way, but from the Indian and Capricorn Plates.

Citations //An Aerial View of the San Andreas Fault in the Carrizo Plain, Central California //. //How Earthquakes Happen //. Web. 4 Nov. 2009. <[]>. // Convergent Plate Boundary: crustal generation and destruction //. Encyclopedia Britannica. //Encyclopedia Britannica // . Web. 4 Nov. 2009. <[]>.

//Divergent Boundary //. NASA. //Why isn't the earth perfect //. Web. 4 Nov. 2009. <[]>.

elosoenpersona,. //Machapuchare Summit (6.993m), Nepal //. 2007. //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">Flickr //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">. Web. 3 Nov. 2009. <[]>.

Giddings, Al. //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">Black Smokers //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">. 2009. National Geographic Society. //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">National Geographic //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">. Web. 3 Nov. 2009. <[]>.

Pidwirny, Michael //Mountain Building.// PhysicalGeography.net, 1999. Web. 13 Nov. 2009 <[]>.

//Plate Tectonics.// National Geographic, 1996. Web. 12 Nov. 2009 <[]>.<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">

Shaw, Cindy.2005. McGraw Hill Higher Education. //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">Science-Art //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">. Web. 4 Nov. 2009. <[]>.

//The Story of Plate Tectonics.// Web. 12 Nov. 2009 <[]>.

//<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">Transform Boundary //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">. NASA. //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">Why isn't the earth perfect //<span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">. Web. 4 Nov. 2009. <[]>.

//Understanding Plate Motions.// Usgs, 5 May 1999. Web. 13 Nov. 2009 <[]>.

//Visualization.// McDougal Littell. Web. 13 Nov. 2009 <[]