Oceanic and continental crusts

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how thick are oceanic crusts?
5-10km
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how thick are continental crusts?
25-100km
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are oceanic crusts dense or not?
dense
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are continental crusts denser or less dense than oceanic?
less dense
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what happens to oceanic crusts when it meets continental crusts?
sinks underneath into mantle (destructive plate boundary)
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how old is oceanic crust?
oldest - 180 million years old
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how old is continental crust?
3-4 billion years old
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does new oceanic form or not?
yes, constantly at constructive plate boundaries
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does new continental form or not?
no
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can oceanic be destroyed?
yes, at destructive plate boundaries
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can continental be destroyed?
no
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Other cards in this set

Card 2

Front

how thick are continental crusts?

Back

25-100km

Card 3

Front

are oceanic crusts dense or not?

Back

Preview of the front of card 3

Card 4

Front

are continental crusts denser or less dense than oceanic?

Back

Preview of the front of card 4

Card 5

Front

what happens to oceanic crusts when it meets continental crusts?

Back

Preview of the front of card 5
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