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Dynamic Earth

The Earth has many plates that move in all different directions causing land forms to create. When plates collide or move into each other it is called a Convergent boundary. A sub type of Convergent Boundaries is subduction. This happens when the plates dive under and cause trenches. 1. An example of a Convergent boundary is when there was Volcanic activity atop of the South American Plate, a few hundred miles east of its collistion with the Nazca Plate forming the Andes Mountain Range. When the plates collide the crust rumples and forms a mountain range. 2. Another Convergent boundary was 55 million years ago India and Asia collided and over time the Himalaya was formed. As the mash-up continues the moutnains get higher. 3. The Indo-Australian plate collided into a Phillippine Plate pushing up the ovean floor above sea level creating island chains, island arcs, and a twisted sea floor. Divergent boundaries happen when plates move apart. Magma rises to push plates apart. 1. A narrow sea formed where the African and Arabian Plates are diverging. This created the Red Sea. 2. Volcanoes and linear lakes within the rift valley were formed from a developing divergent boundary in East Africa. 3. Giant troughs like the Great Rift valley was formed from the African Divergent boundary when the plates tugged apart. Transform Boundaries happen when plate move sideways in relation to each other or in other words grind against each other. 1. The linear features are faults formed in the fracture zone between the Pacific and North American Plates making the San Andreas Fault Zone. 2. The San Andreas Fault in California was created when the two plates grinded past each other along what is called strike-slip faults. 3. The Alpine Fault is a strike slip fault between the Australian Plate and the Pacific Plate. This made the Alpine Fault, in South Island, New Zealand. Citations- Stein, seth. "Plate Tectonics." //National Geographic//. National Geographic Society, 2009. Web. 6 Nov. 2009. . -"Geology and Earth Science." //Geology.com//. Geology.com, 2009. Web. 6 Nov. 2009. .
 * Convergent Boundaries**
 * Divergent Boundaries**
 * Transform Boundaries**