THE ROCK CYCLE AND IGNEOUS ROCKS

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THE ROCK CYCLE AND IGNEOUS ROCKS
B16a
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ROCK CYCLE

• Processes by which all rocks can be formed from
  and can form all other rocks.
• Actually a Rock Web.

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IGNEOUS ROCKS(from rock to magma)

• MELTING
• heat from Earths core
• Changes rock from solid to liquid
• MAGMA
• intermediate
• molten/melted rock below earths surface

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IGNEOUS ROCKS(from magma to rock)

• MAGMA
• COOLING
• Temperature drops and rock changes from liquid to
  solid
• Result igneous rock

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INTRUSIVE INGNEOUS ROCKS

• MAGMA COOLS INSIDE EARTH
• cools slowly
• mineral grains have time to grow very large
• Can see individual mineral grains (crystals) in
  rocks

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EXTRUSIVE INGEOUS ROCKS

• LAVA COOLS ON EARTHS SURFACE
• cools quickly
• small to no mineral grains present
• Rock appears to be all one color