This richly illustrated rock cycle diagram shows how any rock can become any other type over time. Students will see the processes connecting all three rock types: igneous (cooling & crystallization), sedimentary (compaction & cementation), and metamorphic (heat & pressure), as well as weathering/erosion, melting, and more. Examples include granite, obsidian, sandstone, shale, gneiss, and marble. Perfect for: • Middle school geology units • Rock and mineral identification lessons • E