Rocks, Rocks, and More Rocks Metamorphic

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Rocks, Rocks, and More RocksMetamorphic

• Classified according to the arrangement of the
  grains that make up the rock the minerals in
  them

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Metamorphic rocks are nicknamedChanging
Rocks.Why?
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How do Metamorphic rocks form?

• From heat pressure deep inside Earth

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Metamorphic rocks can form from Igneous,
Sedimentary, or other Metamorphic rocks as they
are pushed down toward the heat of the mantle.
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2 Types of Metamorphic Rock

• Foliated

• Nonfoliated

Banded
Nonbanded
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Foliated Metamorphic Rock

• Def Grains arranged in layers or bands that
  split into layers
• Examples
• Slate Schist Gneiss

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Original Rock ?New Metamorphic Rock

• Shale ??????

• Slate

Shale (sedimentary) changes to Slate when heated
squeezed by pressure.
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Original Rock ? New Metamorphic Rock

• Granite ??????Gneiss

Granite (Igneous) changes to Gneiss when heated
squeezed by pressure.
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Nonfoliated Metamorphic Rock

• Def Mineral grains arranged randomly, do not
  split into layers
• Examples
• Marble Quartzite

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Original Rock ? New Metamorphic Rock

• Sandstone ??????Quartzite

When Sandstone (Sedimentary) is under extreme
heat pressure, Quartzite will form.
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Uses of Metamorphic Rocks

• Slate
• Marble

• Old fashioned chalkboards, roofs, walkways, trim
  on buildings
• Sculptures (most famous
• Lincoln Memorial in Washington
• D.C.)
• Buildings

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How are the 3 rock types related?
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THE ROCK CYCLE!

• Use the online textbook Active Art to
  complete the rock cycle diagram
• http//www.phschool.com/webcodes10/index.cfm?fusea
  ctionhome.gotoWebCodewcprefixcfpwcsuffix1056
• Lets learn the Rock Cycle Song

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To the tune of Row, Row, Row Your Boat
The Rock Cycle Song

• Sedimentary rock has been formed in layers
• Often found near water sources
• fossils and decayers
• Then theres Igneous rock, here since Earth was
  born
• Magma, lava cooled and hardened
• thats how it is formed
• These two kinds of rocks can also be transformed
• With pressure, heat, deep in Earth
• Metamorphic theyll become