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Oh Rocks, rocks, how do I love you? Let me count the ways.

Oh Rocks, rocks, how do I love you? Let me count the ways. Igneous, Sedimentary, and Metamorphic Rocks. The Rock Cycle. The sequence of the rock cycle depends on the processes that change rocks Weathering Erosion Deposition Pressure Heat. Weathering

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Oh Rocks, rocks, how do I love you? Let me count the ways.

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  1. Oh Rocks, rocks, how do I love you? Let me count the ways. Igneous, Sedimentary, and Metamorphic Rocks.

  2. The Rock Cycle • The sequence of the rock cycle depends on the processes that change rocks • Weathering • Erosion • Deposition • Pressure • Heat

  3. Weathering The breaking down of rock by wind, ice, and heat Erosion The process of sediment moving from place to place by wind, water, ice, or gravity Deposition When sediment moved by erosion comes to rest Heat and Pressure When sedimentary rock is squeezed by layers of sediment, heat and pressure may transform sedimentary rock to metamorphic rock Processes of the Rock Cycle

  4. Igneous Rock • Form from cooling magma • Type of igneous rock depends on: • What’s in the magma? • Time to cool • The longer the cooling time, the more crystals will grow

  5. Igneous Rock: Intrusive or Extrusive • Intrusive • Formed below Earth’s surface • Coarse-grained • Likely many crystals • Extrusive • Formed from eruptions • Very small or no crystals

  6. Sedimentary Rocks: Formation • Weathering • Rocks become fragments • Erosion • Rock/mineral fragments moved from one place to another • Deposition • Layer-making

  7. Sedimentary Rocks: What’s in them? • Clastic • Fragments of rock cemented together by quartz, calcite, etc. • Chemical • Solutions of dissolved minerals and water • Organic • Made from fossilized plant/animal remains

  8. Metamorphic Rock • Literally means “changed shape” • Rock changed by high temperature and pressure into new rock • Mostly happens deep beneath the Earth

  9. How the Shape Change Takes Place • Contact Metamorphism • When magma moves near, or touches, existing rock and changes it. • Regional Metamorphism • When pressure deep below the Earth from tectonic plate movements deforms existing rock

  10. The Rock Cycle:Summary • The processes of the rock cycle create three types of rocks • Igneous (made from cooled magma) • Sedimentary (layers of weathered and eroded sediment compacted together) • Metamorphic (rock changed by extreme heat and pressure)

  11. The Rock Cycle

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