METAMORPHIC ROCKS
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North Carolina State University *
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Course
101
Subject
Geology
Date
Jan 9, 2024
Type
docx
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3
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PRE-LAB QUESTIONS
1.
Where might you find regional metamorphic rocks being formed today? Select all that
apply.
a.
In the core of the Himalayas
b.
Adjacent to a lava flow
c.
Near a deep, large igneous intrusion
d.
In a shallow fault zone
e.
None of the above
2.
Match the following foliated rocks with their metamorphic grade:
Schist = 2. Second-highest grade
B. Slate = 4. Lowest Grade
C. Gneiss = 1. Highest Grade
D. Phyllite = 3. Second-lowest grade
3.
The parent material of a metamorphic rock is known as the
PROTOLITH
4.
True or False? Regional metamorphism is a localized event
. FALSE
5.
What are the three types of metamorphism?
Regional, Contact, and Dynamic
©2016, eScience Labs
Metamorphic Rocks
Metamorphic Rocks
Metamorphic Rocks
EXERCISE 1 DATA SHEET
Table 5. Metamorphic Rock Identification
Rock
Sample
Foliated
(Yes/No)
Grain Size
Other Textural
Features
Composition
Rock Name
Protolith
M
Yes
Medium
Appears smooth
Hard
Amphibole
Biotite
Calcite
Chlorite
Garnet
Kyanite
Muscovite
Quartz
Sillimanite
Tourmaline
Schist
Shale
Mudstone
Or Siltstone
N
No
Hard -
Coarse
Gritty
Scaled
Calcite
Dolomite
Marble
Limestone
Or
Dolostone
O
No
Fine
Smooth
Is bumpy
Plagioclase
Feldspar
Andalusite
Biotite
Feldspar
Hornfels
Any Type
P
Yes
Medium
Rough
Dark colors
Amphibole
Biotite
Kyanite
Muscovite
Sillimanite
Gneiss
Shale
Mudstone
Siltstone
Granite
Q
No
Fine
Grit
Hardened
Quartz
Quartzite
Quartz
Sandstone
R
Yes
Fine
Metallic
Luster
Hard shell
Graphite
Tourmaline
Anthracite
Bituminous
Coal
©2016, eScience Labs
Metamorphic Rocks
Metamorphic Rocks
Metamorphic Rocks
POST-LAB QUESTIONS
1.
How did you determine the compositions of sample N and sample Q?
Both N and Q are non-foliated rocks. I determined the composition by looking closely
through the magnifying glass. I was able to see the size and shape to identify the rock.
2.
Where might you find a rock like sample M being formed on Earth today?
Many schist rocks can be found in eroded mountains or glacial deposition.
3.
Sample R is highly desired in the energy industry because it is the most “clean” variety.
Using your knowledge of metamorphic processes, how do you think this rock becomes
so “clean” compared to its protolith?
Bituminous coal is not as environmentally friendly as Anthracite coal. Anthracite coal
produces no smoke or particulate emissions and is not a fire hazard when used in more
circulated airways. It is cleaner than protolith as it adds extra heat and pressure to alter
its overall properties making it less harmful.
©2016, eScience Labs
Metamorphic Rocks
Metamorphic Rocks
Metamorphic Rocks
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