Tectonics-part1

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They cause the earths core to generate thermal convection currents in the asthenosphere
Hot spots
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New crust created where plates move apart
Constructive boundaries
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Older crust is destroyed where plates move together
Destructive boundaries
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When constructive boundaries oceanic crust move apart produce
Mid ocean ridges
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When constructive boundaries continental crust move apart producing
Rift valleys
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Space between constructive (divergent) boundaries is filled with
Basalitic lava
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Volcanic activity also occurs along the ridge forming
Submarine volcanoes
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New crust forms, at right angles to the plate boundary
Transform faults
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Spreading of the plates occur at different rates leading to friction and
Earthquakes
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Earthquakes that occur at constructive plate boundaries are generally
Shallow focus
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At constructive margins in continental areas, crust falls between parallel faults to form a
Rift valley
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Rift valley example is 4,000 km long from Mozambique to the Red sea
African Rift Valley
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Rift valleys are also associated with ......(Kilimanjaro) due to the thinning crust a result of tension in the lithosphere
Volcanic activity
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Other cards in this set

Card 2

Front

New crust created where plates move apart

Back

Constructive boundaries

Card 3

Front

Older crust is destroyed where plates move together

Back

Preview of the front of card 3

Card 4

Front

When constructive boundaries oceanic crust move apart produce

Back

Preview of the front of card 4

Card 5

Front

When constructive boundaries continental crust move apart producing

Back

Preview of the front of card 5
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