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Dynamic Earth

1. D ivergent Boundary- A divergent boundary is magma that rises and pushes plates apart.


 * Example one- there are giant troughs such as the Great River Valley from plates. The plates are tugged apart. If they continue to diverge, millions of years from now. Africa will be split from the continent. The mid ocean ridge would mark the boundary between the plates.
 * Example two- East Africa may be the site of Earths next major ocean. Plate interactions in the region provide scientists an opportunity to study. Firsthand how the Atlantic may have begun to form about 200 million years ago.
 * Example three- The indonesian island of krakatau has formed near the subduction boundary between two oceanic plates.

2. __Convergent Boundary__- A plant collides with or dives under another.


 * Example one- Off the coast of South America along the Peru-chile trench. The ocean Naza Plate is pushing into and being subducted under the continental part of the South America Plate is being lifted up, creating the towering Andes mountains, the backbone of the continent.
 * Example two- On June 9, 1994 a magnitude earthquake struck about 320 km northeast or LA Paz. Bolivia at adepth of 636 km. The South American Plate was one of the deepest and largest subduction earthquake.
 * Example three-The Himalayan mountain range dramatically demonstrates one of the most visible and spectacular consequence. The crust tends to buckle and be pushed upward or sideways.

3. __Transform Boundary__- Two plates grind against each other.
 * Example one- The San Andreas fault zone which is about 1300 km long and in places tens of kilometer through two thirds of the length of California. Along it, the Pacific Plate has been griding past the North American Plate for 10 million years, at an average rate of about 5 cm/yr. Land on the West side of the fault zone is moving in a north westerly direction relative to the land on the East Side of teh fault zone.
 * Example two- The Strongest and most famous earthquake along The San Andreas fault hit San Francisco in 1906. Many buildings were shaken to pieces by the quake and the rest of the city was destroyed by the fires that followed.
 * Example three- Alpine Fault is a strike fault between the Austrian plate and the pacific plate.

__Citations__ Michellelovespink26,. //Under a volcano//. 2009. //Flickr//. Web. 3 Nov. 2009. < [] >. //Transform Boundary//. //Nature Gallery (Earth)//. Web. 4 Nov. 2009. < [] >. Shaw, Cindy.2005. McGraw Hill Higher Education. //Science-Art//. Web. 4 Nov. 2009. < [] >. "Science and Space." //Plate Tectonics, Tectonic Plates Information, Facts, News Photos//. National Geographic Society, 1996-2009. Web. 5 Nov. 2009. . Watson,. "Understanding Plate Motions ." //Understanding plate motions this dynamic Earth, USGS//. 5 May 1999. Web. 5 Nov. 2009. .