Assign3-IgneousRks-ADA
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School
New Mexico State University *
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Course
111G
Subject
Geology
Date
Dec 6, 2023
Type
docx
Pages
3
Uploaded by DoctorCheetahPerson1995
GEOL 111
Learning Assignment 3 File
Igneous Rocks
1.
List the rock-forming
minerals
that make up igneous rocks.
o
Quartz
o
Potassium Feldspars
o
Mica
o
Amphibole
o
Pyroxene
o
Olive
o
Biotite
o
Muscovite
o
Plagioclase
2.
Play the Igneous Rock game until you get 100% correct. Take a screen
shot of your results and paste below.
3.
Play the Igneous Rock Classifications game until you get 100% correct.
Take a screen shot of your results and paste below.
GEOL 111
Learning Assignment 3 File
Igneous Rocks
4.
Using Bowen's Reaction Series along with the descriptions of igneous rocks
from your textbook, identify the intrusive (plutonic) and extrusive (volcanic)
igneous rocks that will form at locations A, B, C, and D.
A. intrusive=
Peridotite
A. extrusive=
Komattie
B. intrusive=
Gabbro
B. extrusive=
Basalt
C. intrusive=
Diorite
C. extrusive=
Andesite
D. intrusive=
Granite
D. extrusive=
Rhyolite
5.
Suppose you were given a fist-sized sample of igneous rock.
a.
How would you tell if it is volcanic or plutonic in origin?
Plutonic rocks are found underground. They are created when magma
freezes and cools underground, they are intrusive rocks. The crystals in
the rocks are coarse-grained, and the rocks can be any number of
hues. Aboveground volcanic rocks are thought to be the cooled and
solidified lava. Small crystals frequently develop in the rocks when the
lava cools. Rocks from volcanoes can cool much more quickly than
rocks from plutons. Volcanic rocks will have a glossier look, and
because the crystals are so minute, they won't be as obvious. Also
GEOL 111
Learning Assignment 3 File
Igneous Rocks
referred to as extrusive rocks
.
b.
How could you tell if it is felsic or mafic?
Felsic minerals are white,
whereas mafic minerals are deeper in color.
6.
On the figure provided, match up each of the igneous rock bodies with the
listing below. Note, each name may be used >once.
Igneous body
Number(s)
Dike
8
Stock
7
Volcanic neck
3
Sill
5
Volcano
1
Laccolith
6
Lava flows
2
Batholith
9
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