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Plates Glossary
Term | Definition |
---|---|
Collision margin | where two continental plates are moving towards each other |
Conservative margin | where two tectonic plates are moving past each other |
Constructive margin | where two tectonic plates are moving apart ands new crust is formed |
Destructive margin | where two tectonic plates are moving together and oceanic crust is destroyed by subduction |
Continental plate | the part of the Earth's crust that makes the continents |
Core | The centre of the Earth |
Crust | The solid outer layer of the Earth |
Fold moutains | mountains formed by the bending and buckling of the rocks where two tectonic plates collide |
Fissure | A line of weakness in the crust, such as a fault, through which lava may erupt |
Island arc | a chain of volcanic islands |
mantle | the layer of the earth below the crust made of magma |
Oceanic plate | the part of the earth's crust which is under the oceans |
Ocean trench | a long, narrow and very deep gorge in the ocean floor |
plate | a large, rigid slab of the Earth's crust |
Plate margins | the boundary where two plates meet |
Shield volcano | a low, flat volcano, like an upturned shield, made from basic lava |
subduction zone | an area of the Earth's crust where one tectonic plate descends below another |