Layered rock is a type of rock that is composed of multiple layers of different minerals. Shale, which is a type of sedimentary rock, is composed of clay or mud particles that have been compressed over time. MICA is a group of silicate minerals that form thin, flat sheets and are often found in metamorphic rocks. Gneiss is a type of metamorphic rock that is characterized by its alternating layers of light and dark minerals. All three of these rocks are examples of layered rock.