The Rock Cycle Project 1

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Igneous/Metamorphic/sedimentary

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The Rock Cycle Project 1

  1. 1. The Rock Cycle
  2. 2. Igneous rocks <ul><li>Formed by the cooling and crystallization of magma (magma is molten rock inside the earth) </li></ul><ul><li>Intrusive igneous rocks are crystallized deep in the Earth </li></ul><ul><li>Extrusive igneous rocks are formed where the lava flows to the surface </li></ul>
  3. 3. <ul><li>Igneous rocks are classified based on </li></ul><ul><ul><li>Texture </li></ul></ul><ul><ul><li>Shape </li></ul></ul><ul><ul><li>Size </li></ul></ul><ul><ul><li>Arrangement of minerals </li></ul></ul>
  4. 4. Metamorphic Rocks <ul><li>Can be formed in different ways </li></ul><ul><li>Generally, they are re-crystallized by heat and pressure </li></ul><ul><li>Igneous, sedimentary and metamorphic rocks can become new metamorphic rocks </li></ul><ul><li>The new rock may have some of the original characteristics of the old rocks </li></ul><ul><li>Sometimes the change is so complete that new minerals are formed and texture is changed </li></ul>
  5. 5. <ul><li>Two types of Metamorphic Rocks </li></ul><ul><ul><li>Follated - rock has layers </li></ul></ul><ul><ul><li>Non-Follated - is crystalline and shows no layers </li></ul></ul>
  6. 6. Sedimentary Rocks <ul><li>Formed at or near the surface of the Earth </li></ul><ul><li>Sediments are deposited in beds or layers by water or wind as a result of erosion </li></ul><ul><li>Ninety-eight percent of sedimentary rocks are shale, sandstone and limestone </li></ul>
  7. 7. <ul><li>Types of Sedimentary Rock </li></ul><ul><li>Clastic </li></ul><ul><li>-rock fragments or minerals broken from pre-existing rock </li></ul><ul><li>Chemical </li></ul><ul><li>-results from chemical precipitation from fresh or salt water </li></ul><ul><li>Organic </li></ul><ul><li>-made from plant or animal particles </li></ul>
  8. 8. The Rock Cycle

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