Our earth Crust Our planet's outer layer began taking shape 4.5 billion years ago a top fireball of asteroids, comets, and other space debris that clumped into a goey lump to form Earth. As the surface cooled and hardened. Earth's crust was formed. It comes in two types, continental crust, and Oceanic crust. When you reach down and feel the ground, you're touching continental crust. It ranges from 6 miles(910km) upto 47 miles(75km) deep under Mount Everest. Continental crust consist of less dense and much older rock that erupts from cracks in the ocean floor and cools to form new crust. medicore D igi product Keto diet plan - Digi product Mantle Next to crust is Mantle a layer os semi-molten metals such as iron, magnesium, and aluminum. The heat and the pressure here are intense enough to compress carbon into diamonds, the hardest natural material on Earth. The easiest way to reach the mant