Show e the cause of Earthquake i earthquakes are due to the phenomena of 0 or folding of the earths upper strata the same tension and compression which pro produced nee many of the mountain ranges is here in action As the interior of the earth cools it contracts and tends to leave theoster the outer crust behind the weight of this outer crust however is greater than it can cad sustain and is therefore compelled to wrinkle thus geologists explain the great ridges and furrows which constitute continents and river basins and they compare this folding of the earths crust with the wrinkling of 0 f the skin of a dried apple while the ta process of wrinkling or folding is going on the mighty movement of course destroys the equilibrium of the rock strata and in consequence eart earthquakes it occur and continue with greater or less violence until the equilibrium is again restored |