Essay Questions

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  1. 1. Compare three types of convergent plate boundaries (oceanic-oceanic, oceanic-continental, and continental-continental) and describe what happens at each with specific geographic examples

The three kind of convergent plate boundaries is oceanic continental, oceanic-oceanic, and continental-continental.

The oceanic-continental convergence zones are typified by subduction zones, which are areas where an oceanic plate subducts under a continental plate. These are places of strong tectonic activity because of the melting of crust in the asthenosphere. The overriding South American Plate is being lifted up, produce the towering Andes mountains, the backbone of the continent. when two oceanic plates converge, one is usually subducted under the other, and in the process, a trench is formed. Subduction zones can also happen at oceanic-oceanic plate boundaries. And in the process, a ditch is formed. The Marianas Trench is where the fast-moving Pacific Plate converges against the slower moving Philippine Plate.

Continental-continental convergence engages negligible subduction; it instead creates massive deformation and substantial buildup of a crustal rock mass. The Himalayan mountain range demonstrates one of the most visible and spectacular consequences of plate tectonics. The collision of India into Asia 50 million years ago caused the Eurasian Plate to wrinkle up and override the Indian Plate. After the collision, the slow nonstop convergence of the two plates over millions of years pushed up the Himalayas and the Tibetan Plateau to their present heights.

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