Metamorphic Rocks

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Metamorphic Rocks

• The Worlds Wonderful Waffles

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What is a Metamorphic Rock?

• A Metamorphic Rock is a rock that has been formed
  over time with heat and pressure.
• Come take a tour and lets see how these
  magnificent rocks are formed.

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How are Metamorphic Rocks formed?
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Over time, the sediment layer pushes downward.
This builds up heat.
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With the combination of heat, pressure and time,
these sedimentary rocks actually change and
become much MUCH harder.
After intense heat and pressure this Sedimentary
Rock becomes
Remember our shale?
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Gneiss!!!
Notice the bands that run across this VERY hard
rock.
but were not done yet!
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It can also become slate
You may have seen slate on the roof of a house.
You may have seen slate on a floor or driveway.
Again, these rocks are VERY hard.
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Remember our Limestone?
After much time, pressure and heat, this lovely
rock becomes
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Marble!!!
Metamorphic Rocks are also extremely dense
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What does DENSE mean exactly?

• If something is dense, it means packed closer
  together.

Metamorphic rocks are more dense than Sedimentary
rocks.
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What about Sandstone?
After heat, pressure and time take their toll,
Sandstone becomes
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Quartzite
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Heres a brief quiz

• What is a Metamorphic Rock made of?
• It is made of Sedimentary and Igneous rocks that
  have been changed.
• What three things form a Metamorphic Rock?
• Heat, Pressure and Time
• What happens to the Sedimentary Rock that causes
  the metamorphosis to begin?
• It compresses

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A few more questions

• After the metamorphic rock cools, it becomes
  _________ than a Sedimentary Rock.
• Harder
• After the metamorphosis, the Sedimentary Rock,
  Shale becomes which Metamorphic Rock?
• Slate or Gneiss

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a couple more

• After the metamorphosis, the Sedimentary Rock,
  Limestone becomes which Metamorphic Rock?
• Marble
• After the metamorphosis, the Sedimentary Rock,
  Sandstone becomes which Metamorphic Rock?
• Quartzite

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Stay tuned for our next journey

• Inside the Igneous Rock