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Name ___________________________________ Date _______________
Class Period _____
Instructor _____________
Lab Period ______
5 points
Metamorphic
Metamorphic Identification Chart 1 point each
Rock
Texture
Number
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
Grain Size
Rock Name
Type of Change
Type of
Metamorphism
Rock Before
Metamorphism
Questions: 3 points each. For questions #1-3, use complete sentences. No pronouns.
1.
2.
3.
4.
A
B
C
D
5.
A
B
C
D
6.
A
B
C
D
7.
A
B
C
D
8.
A
B
C
D
Lab #16 Metamorphic Rocks
INTRODUCTION:
Metamorphic rocks are rocks that form from other rocks due to
exposure to heat, pressure or chemical change. "Meta" means change and "morph" means
form, thus metamorphic rocks are rocks that have changed form. In this lab, some
metamorphic rocks will be identified using their characteristics, the Scheme for Metamorphic
Rock Identification in the Earth Science Reference Tables and help from the information
given below.
PROCEDURE:
Texture
List whether the rock is foliated or non-foliated. Foliation is layering or banding so if the
rock shows layering or banding, it is foliated. All rocks without layers or banding are nonfoliated.
Grain Size
Tell whether the grain size is fine, medium or coarse. If you can see grains easily, it is
coarse. If grains are not easily seen, it is fine.
Rock Name
Use the reference table to determine the metamorphic rock name. Use the texture, grain size
to try to determine the name.
Type of Change
Write whether the rock has been distorted (twisted and bent), banded (layering of like
minerals), increased in density or a chemical change.
Type of Metamorphism
From the Earth Science Reference Tables, determine whether the metamorphism is Regional,
Contact or both.
Rock Before Metamorphism
Try to determine which rock was the original rock before metamorphism. Go by chart in the
Earth Science Reference Tables.
Questions: For questions #1-3, use complete sentences. No pronouns.
1.
Which rock(s) were difficult to determine whether they were foliated? Why?
2.
Which rocks were difficult to determine what rock they had metamorphosed from?
Why?
3.
What types of changes can happen to a rock when it undergoes metamorphism due to
heat and pressure?
4.
Metamorphic rocks result from the
A)
recrystallization of rocks
B)
erosion of rocks
C)
cooling and solidification of molten magma
D)
compression and cementation of soil particles
5.
Which rocks would most likely be separated by a transition zone of altered rock
(metamorphic rock)?
A)
sandstone and limestone
B)
shale and sandstone
C)
granite and limestone
D)
conglomerate and siltstone
6.
Which of the following metamorphic rocks are foliated?
A)
hornfels
B)
metaconglomerate
C)
anthracite coal
D)
schist
7.
Which rock is most likely metamorphic?
A)
a rock showing mud cracks
B)
a glassy rock with no crystals formed
C)
a rock composed of distorted light-colored and dark-colored mineral bands
D)
a rock consisting of layers of rounded sand grains
8.
The metamorphism of sandstone rock will cause the rock to
A)
become more dense
B)
be melted
C)
contain more fossils
D)
occupy a greater volume