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20776810
Geography Plates
Description
Major plates and plate movement
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major plates and plate movement
geography
first year
Mind Map by
maria zilbere
, updated more than 1 year ago
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Created by
maria zilbere
over 4 years ago
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Resource summary
Geography Plates
There are 7 plates
Major plates
African plate, American plate, Australian plate, Eurasian plate, Indian plate, Nazca plate, Pacific plate
Plate Movement
Plates seperate
When 2 plates pull apart a crack (fissure) is formed this allowes magma from the mantle to rise up through the opening
The magma cools and a new crust is formed. features such as volcanic islanad and mid ocean ridges are created as a result
This type of plate boundary is known as a constructive boundary as new land is formed
Plates collide
When 2 plates collide or push together the heavier one is pulled under the other
Heavier plate sinks into the mantle where it melts
the lighter plate is buckled and folded upwards
This is a destructive boundary as the crusy is destroyed
This forms fold mountains
Plates slide past eachother
When 2 plates slide past eachother it causes pressure to build up
When pressure is released earthquakes occur
this is known as a conservative boundary as land is neither created nor destroyed
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