Broken bits of rock lie on top. The tiniest bits of rock make up sand and soil. Beneath Earth’s crust is an additional layer of mainly solid rock, known as the mantle. Pools of melted rock, or magma, variety in the mantle. Encyclopaedia Britannica's editors oversee subject matter areas through https://sticks-of-rock45677.blogrenanda.com/42779960/little-known-facts-about-rock-sticks