Download 3.2 3.3 3.4 Rock Types

Starter
1. What are the building blocks of rocks?
2. Minerals that form from magma form as the result
of _______________________.
3. Why is color not a useful identification property?
4. What is a mineral’s streak?
5. What is the most common mineral group?
• What are the building blocks of rocks?
• Use what you have learned about the rock
cycle to explain the following statement.
One rock is the raw material for another
rock.
• Compare/Contrast magma & lava.
Starter
• Hot liquid rock on earth’s surface is called
_________.
• Fragments of rocks, minerals, and remains
of living things are ____________.
• Rocks change from one type to another in
the _______ __________.
• Liquid rock that cools on or below the
surface forms ______ _________.
3.2-3.4 Types of Rocks p. 66
http://www.public-domain-image.com/naturelandscape/canyon/slides/bryce-canyon-hoodoos.jpg
Today, you will be able to:
• Compare and contrast intrusive and extrusive igneous rocks.
•Describe the major processes involved in the formation of
sedimentary rocks.
•Identify the features that are unique to some sedimentary rocks.
•Predict where most metamorphism takes place.
Vocabulary
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Intrusive igneous rock
Extrusive igneous rock
Erosion
Deposition
Compaction
Cementation
Metamorphism
Keep in mind that:
ALL MINERALS AND
ROCKS ARE CLASSIFIED
BASED ON THEIR
COMPOSITION!!!
Igneous Rocks
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Formation of Igneous Rocks
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Intrusive igneous rocks are formed when magma
crystallizes beneath Earth’s surface.
Extrusive igneous rocks are formed when lava crystallizes
above Earth’s surface.
Igneous Rocks
Obsidian
http://www.oldearth.org/cur
riculum/geology/images/Obs
idian1.jpg
Granite
http://0.tqn.com/d/geology/1
/0/g/V/granitesalinia.jpg
Pumice
http://0.tqn.com/d/geology/1
/0/L/W/pumiceoakland.jpg
Sedimentary Rocks
•
Formation of Sedimentary Rocks
– Weathering, Erosion, Deposition
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Weathering is the natural process of physically or
chemically breaking down rocks.
Erosion involved the weathering and removal of rock.
Deposition occurs when an agent of erosion (water,
wind, ice, or gravity) loses energy and drops sediments.
– Compaction, Cementation
• Compaction is a process that squeezes
(compacts) sediments.
• Cementation takes place when dissolved
minerals are deposited in the tiny spaces
between sediments.
Sedimentary Rocks
Sedimentary Rocks
Siltstone
http://0.tqn.com/d/geology/1
/0/m/7/1/mckittrick9.jpg
http://academics.smcvt.edu/
vtgeographic/textbook/geol
ogy/Sedimentary_layers.jpg
Metamorphic Rocks
•
Formation of Metamorphic Rocks
– Metamorphism means “to change form”
– Most metamorphic changes occur at elevated
temperatures and pressures.
– Conditions for formation are found a few kilometers
below the Earth’s surface and can extend into the
upper mantle.
• Agents of Metamorphism
– Heat  provides the energy needed to drive
chemical reactions
– Pressure  causes a more compact rock with
greater density
Metamorphic Rocks
Metamorphic Rocks
Gneiss
Slate
http://0.tqn.com/d/geology/1
/0/Y/S/1/rocpicgneiss.jpg
http://0.tqn.com/d/geology/1
/0/f/S/1/rocpicslate.jpg
• Complete Post Test for 3.1 The Rock Cycle
• Complete Study Guide for Minerals on Page
45
• Place your Vocabulary Terms in the box
• Review your Rock Cycle Illustration from
Thursday for a Quiz.