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Convergent and Transform Boundaries
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The two types of crust are oceanic and continental
The two types of crust are oceanic and continental. Oceanic crust is more dense than continental crust.
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Convergent boundaries push together.
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Subduction is the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate. The more dense plate will go under the less dense plate.
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The three types of convergent boundaries are Continental-Continental Oceanic-Oceanic Oceanic-Continental
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When continental crust meets continental crust at a convergent boundary, a collision occurs, resulting in folds, faults, and high mountains.
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Ocean trench is a long narrow trench that forms when one plate goes under another at a convergent boundary. This can be oceanic-oceanic OR oceanic-continental.
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At convergent boundaries oceanic plates will go under continental plates because oceanic crust is more dense than continental crust.
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Oceanic-continental convergent boundaries can form mountains.
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At convergent plate boundaries known as subduction zones, a trench and deep earthquakes mark the zone where a slab of oceanic lithosphere descends into the mantle, and volcanoes and mountain ranges form on adjacent land.
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Oceanic crust is younger at an ocean ridge (divergent boundary) and older near a trench (convergent boundary).
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Transform plates slide past one another.
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Transform boundaries connect other plate boundaries and are characterized by earthquakes.
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The San Andreas Fault in California is a transform boundary
The San Andreas Fault in California is a transform boundary. This is a very active boundary causes earthquakes .
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Earthquakes represent sudden breaks in crust continuously stressed by plate movement. Gradually over time, the same movements result in major crustal features.
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