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Lithosphere

The Lithosphere (from the Greek for "rock") consists of the Earth's crust and the uppermost layer of the mantle. It extends below the surface about 60km. This is the region of plate tectonics.

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Quadratic formula

... \right) x + \frac{c}{a}=0 </math> which is equivalent to <math>x^2+\frac{b}{a}x=-\frac{c}{a}.</math> The equation is now in a form in which we ...