smithkendra529 smithkendra529
  • 22-04-2022
  • Chemistry
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The thick old crust of earth is crust

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angelgantYT
angelgantYT angelgantYT
  • 22-04-2022
Continental crust is thick and old -- on average about 50 km thick and about 2 billion years old -- and it covers about 40 percent of the planet. Whereas almost all of the oceanic crust is underwater, most of the continental crust is exposed to the air.
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