The Rock Cycle Igneous Rock Forms when hot, liquid rock cools and solidifies The time it takes for magma to cool determines the texture of the rock formed. Sedimentary Rock forms at or near the Earth’s surface without the heat or pressure that are required for metamorphic or igneous rock most noticeable feature of sedimentary rock is its strata (layers), or stratification classified by the way it forms. clastic chemical organic Metamorphic rock Meta – changed Contact metamorphism – occurs near igneous intrusions Regional metamorphism – occurs deep below Earth’s surface or when large pieces of Earth’s crust collide these rocks are found beneath most continental rock formations. morphic - shape Composition of Metamorphic Rock index minerals – form at certain temperatures and pressures. Two textures • foliated – mineral grains are arranged in bands, or planes non-foliated – NOT arranged in bands, or planes Quiz 1. Igneous rock forms when ______________________. 2. Describe the rock cycle and give an example of how a rock could change from one type of rock to another type of rock.