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04 identifying different types of rocks
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04 identifying different types of rocks

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Features of sedimentary, metamorphic and igneous rocks.

Features of sedimentary, metamorphic and igneous rocks.

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  • 1. Describe your rock.
    • Include information like
    • Colour of minerals
    • Fossils etc.
  • 2. Identifying the Different Types of Rocks
    • Learning Objectives :
    • To compare and contrast the three types of rocks – igneous, metamorphic and sedimentary.
    • To know examples of each type of rock such as limestone, granite and slate.
    • To be able to identify rocks by observing their physical appearance.
  • 3. Sedimentary rocks Sandstone Conglomerate Limestone
  • 4. Metamorphic rocks Slate Marble Quartzite
  • 5. Igneous rocks Granite Pumice Obsidian
  • 6. Summary Sometimes have tiny crystals, no fossils, always hard and sometimes arranged in layers Other rocks were acted on by heat and pressure over a long time (e.g. marble, slate) Contain crystals, very hard, never contain fossils Liquid rock (magma or lava) cooled down and turned back into a solid (e.g. basalt, granite) Usually soft, can contain fossils, easily eroded Small pieces of sediment were stuck together by salt and pressure from rocks above (e.g. sandstone, limestone, chalk) Appearance How they were formed Sedimentary, igneous or metamorphic?
  • 7. Summary Sometimes have tiny crystals, no fossils, always hard and sometimes arranged in layers Other rocks were acted on by heat and pressure over a long time (e.g. marble, slate) Contain crystals, very hard, never contain fossils Liquid rock (magma or lava) cooled down and turned back into a solid (e.g. basalt, granite) Usually soft, can contain fossils, easily eroded Small pieces of sediment were stuck together by salt and pressure from rocks above (e.g. sandstone, limestone, chalk) Appearance How they were formed Sedimentary, igneous or metamorphic?
  • 8. Identifying Rocks
    • You have a variety of rocks.
    • Identify which rock type each one belongs to.
    • Give reasons for your choices.
    • Record your results in a table:
    Drawing Reason for rock type Rock Type Rock name
  • 9. Sedimentary rocks How sedimentary rocks are formed: 1) Weathering 2) Transportation 4) Burial 3) Deposition
  • 10. Metamorphic rocks Metamorphic rocks are formed by the combined effect of heat and pressure on other rocks: Pressure from rocks above… … and heat from magma nearby
  • 11. Igneous rocks Igneous rocks are formed when lava or magma cools down and solidifies If the lava or magma cools QUICKLY it has SMALL crystals If the lava or magma cools SLOWLY it has BIG crystals
  • 12. Which Rock?
    • Card sort.
    • Identify the features of sedimentary, igneous & metamorphic rocks.
    • Remember:
      • Sediment suggests that heavy particles fall and collect over each other.
      • Igneous involves great amounts of heat.
      • Metamorphosis means change, like “Morph” on TV.
  • 13.  
  • 14. Identifying the Different Types of Rocks
    • Learning Objectives :
    • To compare and contrast the three types of rocks – igneous, metamorphic and sedimentary.
    • To know examples of each type of rock such as limestone, granite and slate.
    • To be able to identify rocks by observing their physical appearance.