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The Rock Cycle Rocks form from other rocks. Classifying the rocks of the crust according to their origins shows how closely related they are. The rock cycle is the repeated series of events by which rock gradually and continually changes from one type to another. The diagram of the rock cycle below illustrates a simplified model of this continuous process of rock formation and change. CLASSZONE.COM How Do Rocks Undergo Change? Follow a rock through various paths of the rock cycle. Keycode: ES0602 Rock Cycle Deposition Weathering & Erosion Burial & Compaction He a lting Me Igneous Rock pl if t ta ,W ea nd /o Cementation th rP e ri ng si o n U &E ros ion Ero Uplift Sediments River Delta Image not available. Please refer to the image in the textbook res or in the eEdition CD. su re Sedimentary Rock Solidification e lt M ing Heat and/or Pressure (Metamorphism) Lava Magma at Earth's Surface Melting Metamorphic Rock Magma from deep below Earth’s surface is the source of all Earth’s rocks. When this molten rock approaches or reaches the surface, it cools and solidifies to become igneous rock. Once at the surface, igneous rocks are slowly broken down by weathering and erosion, forming sediments. As later sediments accumulate on top of earlier layers, the buried sediments begin to compact and cement together. In this way, the sediments become sedimentary rocks. Over time, these sedimentary rocks are buried beneath other sediments or are caught in movements of Earth’s crust that expose them to high Chapter 6 Rocks 119