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Volcanism and Tectonics - Tectonics convection cells in the...

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Volcanism Underground, molten rock, called magma, breaks through crack in the lithosphere. Trapped gases are released: H2O, CO2, N2 Viscosity of lava (typically basalt) determines type of volcano
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Unformatted text preview: Tectonics convection cells in the mantle drive the plates: compression produces mountains extension produces valleys, oceans...
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