Mod+1+-+Logan+A

mod 1 Boundaries of The World** = = =Convergent Boundary-A plate collides with one another and then they dive under=
 * Logan Acri

=
This boundary are going right at each other to make a mountain or volcano. A mountain that this plate movement made was MT. Everest. This movement can also make trench like the deepest in the world the Marinana trench. =====

MT Everest is the highest mountain in the himalayas and it was made by the plats India and Asia. They crashed into each and made the himalayas among them was mount Everest.

 * Andes mountains is another example and they were made by the Nazca Plate and then South American plate
 * Another example is the is the Pontic Mountains in turkey was formed from Euasian Plate and the African plate


 * This when plates converge one is usually subducted under the other and process a trench.
 * This made the marinas trench was 11,000m
 * pacific collides with the philippine plate to make the trench
 * This can also make a under water volcano

=continental convergence=


 * This is demonstrated by the himalayas
 * When two continents meet head and collide and nether go downward or upward motion and the crust buckles making mountains.

Divergent boundary- Magma rises and pushes plates apart [[image:divergent1.jpg.gif width="178" height="126"]]
Mid Atlantic ridge In the smack dab middle of the Atlantic Ocean. This happened when the plates of Africa and South America split apart from pangea This happened 20 million years ago!
 * Mountains and volcanos rise along the seam
 * This process renews the ocean floor and widens the great basin
 * This created the Mid Atlantic Ridge which grows 2.5 centimeters per year this ridge makes the ocean larger


 * Middle East Dead Sea was formed from transformed African plate and the Arabian plate made this
 * Transformed also formed the new Zealand Alpine fault Indo Austratilon plate and the pacfic plate

Transform boundary- Two plates grind(slide) against each other



 * Most occur on the ocean floor
 * offset the active spreading ridges producing zig zag plate margin
 * this usually makes earth quackes to happen


 * when the plates Pacfic and North Amercan plates were grinding past it made the San Adres Fault
 * they started grinding 10million years ago at about 5 CM
 * This happened in San Fransico in 1906
 * 1,300 km long


 * Another example is the Puerto Rico trench is the North American plate and the South American plate
 * Another example is the central American trench its is made by the caribbean plate and the south american plate

BiBliography: "Plate Tectonics." //Science and Space//. National Geographic Society, 1996. Web. 12 Nov. 2009. . "Sub Types." //U.S. Geological survay//. U.S Department of the interior, 7 Nov. 2009. Web. 13 Nov. 2009. .