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Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
Types Of Rocks!
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Types Of Rocks!

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This presentation explains the 3 main rock types and their features.

This presentation explains the 3 main rock types and their features.

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Transcript

  • 1. Types of Rocks! What do they have to say to us?
  • 2. The 3 Types of Rocks:
    • Igneous
      • Slow-Cooling
      • Fast-Cooling
      • Flow Direction
    • Sedimentary
      • Chemical
      • Detrital
    • Metamorphic
      • Foliated
      • Non-Foliated
    • About the Author
    • Resource Page
    • Watch a video about the types of rocks!
    Quit Click on the photo to visit a website about the rock types!
  • 3. Igneous Rocks
    • Igneous rocks are found by volcanoes and in mountain belts
    • They form when melted rock cools and becomes a solid.
    • There are 3 prominent ways that igneous rocks form:
        • Some cool slowly and have bigger crystals
        • Some cool very fast and have small crystals
        • Some even show the direction of the lava flow.
    Quit
  • 4. Slow-Cooling Igneous Rocks
    • When magma stays underground, it cools very slowly.
      • This allows time for the crystals to form which is why there are larger crystals in slow-cooling rocks
    Quit
  • 5. Fast-Cooling Igneous Rocks
    • On the other hand, magma can also cool very quickly if the temperature is suddenly lowered. This temperature change can occur when the magma is quenched either by air or water.
      • The crystals have little time to form, therefore, fast-cooling rocks have smaller crystals than slow-cooling rocks.
    Quit
  • 6. Igneous Rocks That Show Flow
    • When magma flows out of a volcano, it is called lava.
    • While the lava is flowing, some of the lava begins to solidify while the lava underneath is still molten. This molten lava pushed through the solid rock and creates a unique rolling texture
    Quit
  • 7. Sedimentary Rocks
    • Sedimentary Rocks are formed when rocks ‘settle out’ of water or air.
    • There are 2 Types of Sedimentary Rocks
        • Chemical
        • Detrital
    • The rock pieces are then cemented together for form Sedimentary Rocks
    • They also contain many fossils from millions of years ago!
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  • 8. Chemical Sedimentary Rocks
    • Chemical Sedimentary rocks form when chemicals, such as calcium carbonate, are precipitated out of the water by organic or inorganic processes.
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  • 9. Detrital Sedimentary Rocks
    • Detrital sedimentary rocks form when solid particles are transported and then accumulate.
    • They occur as a result of chemical or mechanical weathering.
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  • 10. Metamorphic Rocks
    • Metamorphic Rocks are found in areas that have been under lots of pressure and/or temperature.
        • ex: mountains
    • There are 2 types of Metamorphic Rocks:
        • Foliated
        • Non-foliated
    • They can form from either igneous rocks or sedimentary rocks
        • Sandstone changes to quartzite
        • Granite changes to gneiss (which is shown at the right)
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  • 11. Foliated Metamorphic Rocks
    • As a result of compression and stress on the rock, the minerals within the rock align themselves perpendicular to the direction of stress.
      • This alignment creates the banding/foliation in the rock.
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  • 12. Non-Foliated Metamorphic Rocks
    • In general, many non-foliated rocks have not undergone a great amount of stress, and therefore, do not show foliation.
    • Also, the minerals that compose non-foliated rocks are equidimensional crystals. As a result, no foliation would appear because all the mineral grains look similar.
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  • 13. A Little Bit About Me…
    • My name is Laura Donker, and I am an Earth Science major and a Biology minor. I enjoy spending time outdoors…especially in mountainous places, and yes – I do like looking at rocks!
    • One day, I plan to be a science teacher at a middle or high school. I cannot wait to share everything I know with my students !
    • Email me!
    Quit
  • 14. Resources
    • Rock Cycle Image
        • http://www.rocksandminerals4u.com/
    • All Rock Images
        • http://geology.com/rocks/
    Quit

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