Download Lab – Rocks

Name: ____________________________
Period: _____ Date: _________________
Lab – Rock I. D.
RESEARCH: Using notes, homework assignments, and your textbook, fill-in the appropriate
headings for the types of Rock and their sub-groups. Write out the definitions or descriptions of
each type and sub-group in the space provided.
DATA: Carefully observe the characteristics (texture and compositions) of each named and
numbered sample provided in the lab. Write the name and NUMBER in the correct category that
matched its characteristics.
IGNEOUS
2 Classifications
A. _________/__Plutonic_____
B. _________/_Volcanic_____
Description: __________________
____________________________
____________________________
Description: __________________
____________________________
____________________________
Mafic: _________
_______________
_______________
ROCK
# Name
___ ___________
Mafic
Felsic
ROCK
#
Name
___ ___________
ROCK
#
Name
___ ___________
Intermediate
Felsic: _________
_______________
_______________
ROCK
# Name
___ ___________
Intermediate
NO CRYSTALS
Vitreous (
___ ___________
___ ___________
)
___ ___________
Vesicular (
)
___ ___________
Define Porphyritic –___________________________________________________________
_________________________________________________________________________________
Rock # and Name ____ ______________________ porphyry
2014
_____ _____________________ porphyry
SEDIMENTARY
2 Classifications
A. _________/__Detrital_
B. _________/__Chemical_
Description: __________________
____________________________
____________________________
Description: __________________
____________________________
____________________________
2 sub-classes of classification
ROCK
Particle Size
1. Gravel
#
Name
1. BioChemical (organic)
2. Chemical
Description:
Description:
___
___________
______________
________________
___
___________
______________
________________
2. Sand
___
___________
3. Silt
___
_______
4. Clay
___
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ROCK
#
_________
2
Name
ROCK
#
Name
___ ___________
___ ________________
___ ___________
___ ________________
___ ___________
___ ________________
METAMORPHIC
2 Classifications
A. _________/_Banded___
B. _________/__No Layers___
Description: __________________
____________________________
____________________________
Description: __________________
____________________________
____________________________
#
___
ROCK
Name
___________
ROCK
#
Name
___ _____________________
___
___________
___
___ ___________
_____________________
___ __________________
QUESTIONS:
All answers must be written using complete sentences,
complete thoughts. (that means no “it” words)
1. Observe the page on Igneous classification (front page). What are the
“mafic” rocks listed, both Intrusive and Extrusive? What are the
predominant minerals which make up the composition of these rocks?
If necessary you can efer to page 41 in the brown text, or your handout **Bowen’s Reaction Series
2. On the Igneous classification page, what are the “ felsic” rocks listed (both
intrusive and extrusive)? What are the two predominant minerals in the
composition of these rocks?
3. If a rock had a texture of very fine, small crystals and a composition of
Mostly dark colored minerals like olivine and pyroxene, name the rock
that would likely be formed?
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4. What rock would likely form from the same melted material as in question
#4 BUT it did not reach the Earth’s surface, and crystallized at great depth
below the surface of Earth?
5. What does a “porphyritic” texture indicate about an igneous rock?
6. If you had a sample of limestone, how could you determine whether it was
composed of organic sediment or from a chemical precipitate?
7. Why are sedimentary rocks very important in the interpretation of earth
history?
8. What feature would make foliated rocks such as schist and gneiss easily
distinguished from non-foliated rocks such as quartzite and marble?
9. Explain the statement “One rock is the raw material for another.”
10. Define the term “rock” using your own words.
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