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 largely sound rock, called the mantle. Swimming pools of melted rock, or magma, sort while in the mantle. Encyclopaedia Britannica's editors oversee subject matter spots https://sticksofrock80123.blogdanica.com/36377726/rock-sticks-an-overview