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IGNEOUS ROCKS

IGNEOUS ROCKS. Pg 99 text book. http://my.hrw.com. http://www.webquest.hawaii.edu/kahihi/sciencedictionary/images/magma_flow_up.gif. What is the origin of Igneous Rock?. Igneous rock begins as magma. There are three ways magma can form: when rock is heated , when pressure is released,

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IGNEOUS ROCKS

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  1. IGNEOUS ROCKS Pg 99 text book http://my.hrw.com

  2. http://www.webquest.hawaii.edu/kahihi/sciencedictionary/images/magma_flow_up.gifhttp://www.webquest.hawaii.edu/kahihi/sciencedictionary/images/magma_flow_up.gif What is the origin of Igneous Rock? Igneous rock begins as magma

  3. There are three ways magma can form: when rock is heated, when pressure is released, when rock changes composition. What are the ways that magma can form?

  4. Put a drawing like this on pg 37 in your nb

  5. What happens to magma when it cools at different rates? The longerit takes for the magma or lava to cool, the more time mineral crystals have to grow. The more timethe crystals have to grow, the larger the crystals. The larger the crystals are the coarser the texture of the resulting igneous rock is.

  6. What happens to magma when it cools at different rates? The less time magma takes to cool, the less time crystals have to grow. Therefore, the rock that is formed will be fine grained.

  7. Fine-grained igneous rock contains very small crystals, or if the cooling is very rapid, it contains no crystals. What happens to magma when it cools at different rates?

  8. What are the Compositions and Textures ofIgneous Rock? What are examples of each type?

  9. What is Intrusive Igneous Rock? Magma that cools and solidifies deep within the Earth’s crust.

  10. What is Intrusive Igneous Rock? Magma that intrudes, or pushes, into surrounding rock below the Earth’s surface and cools.

  11. Usually has a coarse-grained texture because it is well insulated by surrounding rock and cools very slowly. The minerals that form are large, visible crystals. What is Intrusive Igneous Rock?

  12. Plutons Batholiths Stocks Dikes What are the different masses of intrusive igneous rock named and why? Masses of intrusive igneous rock are named for their size and shape

  13. Plutonsare large, irregular-shaped intrusive bodies. The largest of all igneous intrusions arebatholiths. Stocksare intrusive bodies that are exposed over smaller areas than batholiths. Dikessheetlike intrusions that cut across previous rock units. Sills are sheetlike intrusions that are oriented parallel to previous rock units. Plutons Batholiths Stocks Dikes Sills

  14. PLUTONS

  15. Where would I find Extrusive Igneous Rock? Magma that erupts, or extrudes, onto the Earth’s surface. Extrusive rock is common around volcanoes.

  16. Lavacools quickly on the surface and contains very small crystals or no crystals. What type of texture do extrusive igneous rock have?

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