Rocks are not what they seem. They are constantly changing. Changes can take millions of years or happen very quickly. Find out what happens step by step by repeatedly clicking the mouse or pressing the enter key ……… sediment is compacted (squashed) and particles get cemented Sediment shells mud sand weathering and erosion fast cooling Igneous rock small crystals basalt granite large crystals Sedimentary rock limestone mudstone Any rock can sandstone be weathered or eroded to mud or sand heat and pressure Metamorphic rock marble heat and slate pressure slow cooling cooling and crystallisation (solidification) Magma (molten rock) very hot! very high temperatures causing melting Some changes are rapid eg landslides and volcanic eruptions … … but much of the cycle takes millions and millions of years! Click here to run the Rock Cycle again automatically! sediment is compacted (squashed) and particles get cemented Sediment shells mud sand weathering and erosion fast cooling Igneous rock small crystals basalt granite large crystals Sedimentary rock limestone mudstone Any rock can sandstone be weathered or eroded to mud or sand heat and pressure Metamorphic rock marble heat and slate pressure slow cooling cooling and crystallisation (solidification) Magma (molten rock) very hot! very high temperatures causing melting Move back to any point in this presentation by using either the backspace or up arrow keys. References Peter Hollamby and Steve Lewis for the Royal Society of Chemistry