9-Continents - Origin and Evolution of Continents (Chapter...

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Origin and Evolution of Continents (Chapter 10)
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Two-thirds of Earth’s surface is <200 Ma (4% of Earth’s history). So, need to look to the continents.
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Why are continents so high and the seafloor so low?
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Why are continents so high and the seafloor so low? Isostasy (Greek for equal standing) = gravitational balance that determines elevation. Elevation is a function of 1) density and 2) thickness.
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Why are continents so high and the seafloor so low? Pressure at the base of various parts of the crust is equal, so if crust types are of different densities, then to have the same pressure beneath the thickness (volumes) must
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Why are continents so high and the seafloor so low?
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Why are continents so high and the seafloor so low? Himalayas: crust = 80 km thick Alps: crust = 50-60 km thick
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Isostasy and Geological Processes
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Isostasy and Geological Processes
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Glacial Isostasy
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from building dams and cities? A)Subsidence
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9-Continents - Origin and Evolution of Continents (Chapter...

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