Lab# 5 -In Class Lab - Rocks
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School
CUNY College of Staten Island *
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Course
101
Subject
Geology
Date
Dec 6, 2023
Type
Pages
5
Uploaded by ProfessorMetalEchidna20
Name: ----------------------------------
Date: ------------
Lab 5 Rocks
Required materials
Pencil, Ruler, Magnifier glass, Rock set, Acid bottle.
In-class lab exercises
Part 1 Igneous Rocks
1.
Take samples I-3, I-5, and I-6 from the box of rocks (they have the same Texture).
What type of texture do they have?
Line these samples up from light to dark. Give the sample number for each
color listed.
Light
Intermediate
Dark
2.
What does this tell you about the magma type for each rock?
3.
Now that you know the texture and composition for each rock, you can name them.
Use the table from your textbook or lecture notes.
I-3
I-5
I-6
1
Jessica
Hart
10/10
I
5
Eb
I3
slow
cooling
-
the
rocks
are
different
color
because
of
different
silica
levels
Gabbro
Granite
Dicrite
4.
Take samples I-1, I-2 and I-4 from the rock box.
Two of these samples have the same texture and one is different. List the textures for
each sample.
I-1
I-2
I-4
5.
Line them up from light to dark. Give the sample number for each color
listed.
Light
Intermediate
Dark
What does this tell you about the magma type for each rock?
6.
Now that you know the texture and composition for each rock, you can name them.
Use the table from your textbook or lecture notes.
I-1
I-2
I-4
7.
Take sample I-7 from the rock box. What type of texture does it have? What is the
name of this rock?
8.
Take sample I-8 from the rock box. What type of texture does it have? Is it light color
or dark color? What is the name of this rock?
2
porphyritia
Aphanitic
Aphanitic
I
-
2
I-1
I
-
4
the
alma
is
volcanic'
Andesite
Porphyry
Rhyolite
Basalt
Glassy
texture
.
obsidian
Vesicular
texture
Light
color
pumice
Part 2 Sedimentary Rocks
Take samples S-3, S-5, S-6 and S-7 from the rock box.
1.
All 4 of these rocks are from the
same
sub-category of sedimentary rocks. Are they
clastic, chemical, biochemical or organic?
2.
One of these rocks is fine-grained, one is medium-grained and two are coarse
grained. Give the sample number for each texture listed.
Fine
Medium
Coarse
3.
Looking at the 2 coarse rocks, one has clasts (particles) that are rounded and the
other has clasts that are angular. Give the sample number for each of these two
textures.
Round
Angular
4.
Based on these textures you can name the 4 rocks, using information from the
textbook and your lecture notes.
S-3
S-5
S-6
S-7
3
clastic
-
S-7
S-3
S-5
,
S-6
S-5
S-b
⑤
Sandstone
conglomerate
Breccia
shale
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5.
Take sample S-1 from the rock box. Is it clastic, chemical, biochemical or organic?
6.
Looking back at your lecture notes and textbook, what is the most common rock
type in this group, that would fit with the sample you have?
7.
What mineral does this rock contain?
8.
How would you test for this mineral?
9.
Test the rock. Was your ID correct?
Part 3 Metamorphic Rocks
1.
Take samples M-1, M-2, M-3 and M-4 from the rock box.
All 4 of these rocks are from the
same
foliation category. Are they all foliated or
non- foliated?
2.
What is the name of the texture of each sample?
M-1
M-2
M-3
M-4
4
Chemical
or
biochemical
Chemical
clastic
Hydrociauric
Acid
Yes
-
it
will
react
All
foliated
Foliated
Foliated
Foliated
Foliated
3.
Based on these textures you can name the 4 rocks, using information from the
textbook and your lecture notes.
M-1
M-2
M-3
M-4
4.
Take samples M-5 and M-6 from the rock box.
Both of these rocks are from the
same
foliation category. Are they both foliated or
non- foliated?
5.
What type of texture does each of these samples have?
M-5
M-6
6.
Looking back at your lecture notes and textbook, what are the two possible rock types
for this pair of samples?
7.
Each of these rock types contains only one mineral. Which mineral does each
rock type contain?
8.
Based on your answer to the question, how could you easily test for one of these
minerals?
9.
Perform the acid test, which one reacts to hydrochloric acid?
M-5
M-6
5
Slate
Phylite
schist
Gheiss
Non-foliated
non-foliated
non-foicated
Quartzite
marble
Marble
-
Calcite
&
uartzite
Quartz
HCL
&
Hardness
Did
not
react
Reacted