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Sedimentary, Igneous & Metamorphic Rock

Explore the three main types of rocks: sedimentary, igneous, and metamorphic. Sedimentary rocks, formed from sand, clay, silt, and organic matter, develop through processes like weathering, erosion, deposition, and cementation, typically found at the bottoms of lakes and rivers. Metamorphic rocks, which include previous sedimentary and igneous rocks, form under extreme heat and pressure underground. Igneous rocks arise from cooled magma or lava and vary based on their formation method. Discover their examples, uses, and the rock cycle through engaging videos.

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Sedimentary, Igneous & Metamorphic Rock

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  1. Sedimentary,Igneous &MetamorphicRock

  2. Sedimentary Rock What is it made up of? • Sand, clay, silt, organic matter (fossils) How is it formed (process)? • Weathering (wind, flowing water, ice, living organisms) create sediment • Erosion moves/transports the sediment (water, wind etc.) • Deposition – sediment is deposited at the bottom of bodies of water • Cementation/lithification – the layers are pressed together (cemented) to form rock

  3. Where are sedimentary rocks formed? • At the bottoms of lakes, rivers, oceans, streams… Examples: • Sandstone, limestone, shale Sedimentary rocks are used For: • Buildings, statues

  4. Metamorphic Rock • What is it made up of? • Previous sedimentary and igneous rock • MAY HAVE fossils • Contain layers which look like wavy bands • Hardest rock • How is it formed (process)? • Extreme heat and pressure due to the movement of the Earth’s crust

  5. Where are Metamorphic rocks formed? • Underground in hot temperatures Examples: • Slate and marble Metamorphic rocks are used for: • Countertops, chalkboards, roof shingles, floors

  6. Igneous Rock What is it made up of? • Previous sedimentary and metamorphic rock • Intrusive igneous rock- cooled magma • Extrusive igneous rock-cooled lava How is it formed (process)? • When magma and lava cools and hardens • Intrusive – cools slowly and forms large crystals • Extrusive – cools quickly and forms small crystals or none at all

  7. Where are Igneous rocks formed? • Intrusive igneous rock is formed from magma below ground. • Extrusive igneous rock is formed from lava above ground. Examples: • Intrusive – granite • Extrusive - obsidian and pumice Igneous rocks are used for: • Intrusive - buildings, countertops, statues • Extrusive - arrow heads, sharp blades

  8. ROCK CYCLE

  9. Videos: • Types of Rock and Rock Cycle • https://www.youtube.com/watch?v=Pwlr2uSSgcc • Rocks Song • https://www.youtube.com/watch?v=b_4Y21Pprzw

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