Formations on plate boundaries

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Mid-ocean Ridge
Constructive Margins As the sea-floor spreads the lava wells to fill the gap. This cause the land either side to be pushed upwards creating higher terrain.
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Rift Valley
Constructive boundaries in the centre of the ridge, immediately around the fault the crust drops down. This is due to the plates losing support from one another.
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Deep sea trenches
Destructive- oceanic/continental & oceanic/oceanic The downwarping of the oceanic plate where it is being subducted forms a very deep part of the ocean bed.
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Fold Mountains
Destructive- oceanic/continental & continental/continental This where the minerals and sediments in the mountains is golded and crumpled to make mountain ranges
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Island arcs
Destructive- oceanic/oceanic When the denser late is subducted a submarine volcano is formed to release the gases and magma. Over millions of years the lava builds to above sea level creating chains of islands
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No Volcanoes
Destructive- continental/continental The continents have a similar density and so similar buoyancy. Therefore, neither is subducted
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Where do earthquakes occur?
All plate boundaries
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Where do volcanoes occur?
Constructive, conservative, oceanic/continental destructive & oceani/oceanic destructive
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Other cards in this set

Card 2

Front

Constructive boundaries in the centre of the ridge, immediately around the fault the crust drops down. This is due to the plates losing support from one another.

Back

Rift Valley

Card 3

Front

Destructive- oceanic/continental & oceanic/oceanic The downwarping of the oceanic plate where it is being subducted forms a very deep part of the ocean bed.

Back

Preview of the back of card 3

Card 4

Front

Destructive- oceanic/continental & continental/continental This where the minerals and sediments in the mountains is golded and crumpled to make mountain ranges

Back

Preview of the back of card 4

Card 5

Front

Destructive- oceanic/oceanic When the denser late is subducted a submarine volcano is formed to release the gases and magma. Over millions of years the lava builds to above sea level creating chains of islands

Back

Preview of the back of card 5
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