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how thick.is the earth's crust how thick is the earth's crust in miles how thick is the earth's crust in km how thick is the earth's crust in feet how thick is the earth's crust on average how thick is the earth's crust in kilometers how thick is the earth's crust in meters how thick is the earth's crust at its thinnest point how thick is the earth's crust at its thickest point how thick is the earth's crust approximately
