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Geography: a Destructive Plate Margin and Constructive Plate Margin.

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GEOGRAPHY: A DESTRUCTIVE PLATE MARGIN AND CONSTRUCTIVE PLATE MARGIN These are the plates and were they meet Were the arrows are pushing against each other this is called a DESTRUCTIVE PLATE MARGIN here a oceanic plate and a lighter continental plate push against each other the oceanic being heavier is pushed down into the mantle and melted down then the magma finds a crack or hole and pushes the magma above the ground to form a volcano. Where the plates are pulling away from each other this is called a CONSTRUCTIVE PLATE MARGIN here an oceanic and a continental plate pull apart from each other. ...read more.


and Eurasian Plate Destructive plate boundaries Destructive plate boundaries occur when an oceanic plate is forced under a continental plate Pacific Plate and the Eurasian Plate Conservative plate boundaries Conservative plate boundaries occur when two plates slide past each other. North American Plate and the Pacific Plate Collision plate boundaries Collision plate boundaries occur when two continental plates move towards each other. Indo-Australian and the Eurasian Plate When you get plates moving apart from each other i.e. the South American plate and the African plate. ...read more.


SOME FACTS! 1. Measuring 30 to 75 km thick the continental crust is thicker than the oceanic crust, which is only 3 to 10 km thick. 2. The most ancient rocks, dated to more than 4 billion years, are found in the central regions of the continents. 3. In the Pacific plate, the most ancient parts are only about 200 million years old. This crust is formed when two oceanic plates move apart from each other, causing magma to ooze up from the mantle. This magma solidifies to form volcanic rock. 4. The continental plate is lighter then the oceanic plate. ...read more.

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