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Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
Metamorphic rock
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Metamorphic rock

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  • 1. Metamorphic rock
  • 2. Vocabulary <ul><li>_________- change in rock due to heat and pressure </li></ul><ul><li>__________- has a banded appearance </li></ul><ul><li>__________- does not have a banded appearance </li></ul>Metamorphism foliated non-foliated
  • 3. Let us review <ul><li>We already learned </li></ul><ul><ul><li>There are three types of rocks </li></ul></ul><ul><ul><ul><li>Igneous rocks- </li></ul></ul></ul><ul><ul><ul><ul><li>Igneous – “rock from fire” </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Made by molten rock (magam and lava) that has cooled down </li></ul></ul></ul></ul></ul><ul><ul><ul><li>Sedimentary rocks </li></ul></ul></ul><ul><ul><ul><ul><li>Sedimentary rocks – settled rocks </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Pieces of rocka nd other particles get put together to form rock </li></ul></ul></ul></ul></ul><ul><ul><ul><li>Metamorphic rock </li></ul></ul></ul><ul><ul><ul><ul><li>We shall see……………………….. </li></ul></ul></ul></ul>
  • 4. From what materials are metamorphic rocks made? <ul><li>The easy answer is from ALL rocks </li></ul><ul><ul><li>Whether it is </li></ul></ul><ul><ul><ul><li>Sedimentary </li></ul></ul></ul><ul><ul><ul><li>Igneous </li></ul></ul></ul><ul><ul><ul><li>Metamorphic </li></ul></ul></ul><ul><ul><li>It is a recrystallization of unmelted </li></ul></ul><ul><ul><li>ALL of them can form into metamorphic rocks under the right conditions </li></ul></ul>
  • 5. What are the right conditions to form metamorphic rocks? <ul><li>Heat and pressure </li></ul><ul><ul><li>Therefore metamorphic rocks primarily can only be formed deep in the Earth’s crust </li></ul></ul><ul><ul><li>OR </li></ul></ul><ul><ul><li>Contact metamorphism – this is when it forms because it is near a magma flow </li></ul></ul><ul><ul><ul><li>It gets the heat it needs from the magma </li></ul></ul></ul>
  • 6. <ul><li>Metamorphic rocks can change </li></ul><ul><ul><li>Shape </li></ul></ul><ul><ul><li>Texture of the original rock </li></ul></ul><ul><ul><li>Mineral composition </li></ul></ul><ul><li>Sometimes scientists can sometimes tell What the original rock was and other times they can’t </li></ul><ul><ul><li>The orginal rock is called Parent Rock </li></ul></ul>
  • 7. When do we see metamorphic rock? When the earth’s surface erodes or weathered the metamorphic rock is exposed
  • 8. How can I tell the difference between metamorphic rocks? <ul><li>Metamorphic rocks are usually harder and more dense </li></ul><ul><li>Original layers commonly get bent or distorted </li></ul><ul><li>It may also show foliation </li></ul><ul><ul><li>The alignment of minerals or separation of different minerals into flaky layers or light and dark bands </li></ul></ul>
  • 9. Foliation vs. Non foliation <ul><li>A fantastic way to classify metamorphic rock </li></ul><ul><ul><li>Foliation is very big indicator of metamorphic rocks </li></ul></ul><ul><ul><li>Non- foliation are classified by composition (what they are made up of) </li></ul></ul>
  • 10. Banding <ul><li>Different minerals give metamorphic rocks a striped appearance </li></ul><ul><ul><li>separated of light and dark minerals into layers </li></ul></ul><ul><ul><ul><li>The more pressure and higher temperature and pressure the thicker the band </li></ul></ul></ul>
  • 11. Distorted structure <ul><li>Is folding or bending of rock layers </li></ul><ul><ul><li>This occurs do to strong Earth forces </li></ul></ul><ul><ul><li>Causing the rock to have deformed appearance </li></ul></ul>
  • 12. Regional Metamorphism <ul><li>Makes the most of the metamorphic rock </li></ul><ul><ul><li>This is caused by the pressure that occur with mountain building </li></ul></ul>
  • 13. Let’s review

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