Metamorphic rocks are often formed by processes deep inside the Earth that produce new minerals, textures, and crystal structures. The recrystallization that takes place does so basically in the strong state, rather than by complete remelting, and could be aided by ductile deformation and the presence of interstitial fluids such as water. Metamorphism typically produces obvious layering, or banding, because of the segregation of minerals into separate bands. Rock, in geology, naturally occurring and coherent mixture of a number of minerals.
Chemical sedimentary rocks, like limestone, halite, and flint, form from chemical precipitation. A chemical precipitate is a chemical compound—for example, calcium carbonate, salt, and silica—that types when the answer it is dissolved in, usually water, evaporates and leaves the compound behind. This happens as water travels via Earth’s crust, weathering the rock and dissolving some of its minerals, transporting it elsewhere. These dissolved minerals are precipitated when the water … Read More