Go to: Midterm Exam

Geology (GLGY 423-UCAL) Final

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Some questions have hints and explanations. Click Start to begin.

Start

Congratulations - you have completed Geology (GLGY 423-UCAL) Final.

You scored %%SCORE%% out of %%TOTAL%%.

Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

Which of the following is the most dense mineral in terms of it's chemical structure?

A	Carbonates
B	Epidote
C	Andalusite
D	Sillimanite
E	Kyanite

Question 2

The "phase-diagrams" are used to describe what type of chemical reactions?

A	Chemical reactions involving solid materials.
B	Organic chemical reactions.
C	Rock forming chemical reactions. Hint: Not the best choice out of the given choices here.
D	Reversible chemical reactions.
E	Chemical reactions occurred in solid solutions.

Question 3

In plagioclase solid solution composition diagram, the Albite melting occur at ____ Anorthite melting point.

A	same temperature as
B	high temperatures compared to
C	low temperatures compared to

Question 4

Garnets are isotropic minerals.

A	False
B	True

Question 4 Explanation:

Not always buddy!

Question 5

Which cut will provide a Bxo figure for the following crystal?

Image credit: Zoltai and Stout (1985) Mineralogy: Problems and solutions

A	100
B	111
C	001
D	101
E	110

Question 6

Given the following information, calculate the 2θ angle.
λ = 0.3419 m
d₂₁₀ = 3.92564 Å
n = 1

A	6.495 degrees
B	4.992 degrees
C	22.96 degrees
D	11.48 degrees
E	2.495 degrees

Question 6 Explanation:

Don't forget it is asking for 2θ not theta; = 2.495 degrees.

Question 7

Which of the following is the best way to identify a mineral?

A	Properties in hand sample (physical properties)
B	Birefringence
C	Refractive Index
D	Chemical composition analysis.
E	Interference Figure

Question 8

Given the following information, calculate the wavelength in nm.
Birefringence: 0.024
Thickness of the slide: 0.03 mm

A	7.20 x 10^-4 nm
B	650 nm
C	5.60 10^-4 nm
D	720 nm
E	2.14 ^-3 nm
F	560 nm

Question 8 Explanation:

Question 9

Which of the following is the most dense mineral group in terms of it's chemical structure?

A	Olivines
B	Pyroxenes
C	Amphiboles

Question 10

Uniaxial minerals can have inclined extinction.

A	False
B	True

Question 10 Explanation:

straight and symmetrical only

Question 11

The best property to identify feldspars is the unique twining.

A	False
B	True

Question 11 Explanation:

"In metamorphic rocks, and in low temperature diagenetic rocks in which secondary feldspars may grow, feldspars are typically untwinned." - Dr. Sytle Antao

Question 12

In X-ray Diffraction Pattern Analysis, the high intensity regions will be recorded as...

A	thicker (fatter) peaks.
B	narrower (thinner) peaks.
C	lower (low amplitude) peaks.
D	higher (high amplitude) peaks.

Question 13

The chemical formula for the Pyroxene iron end-member Orthoferrosilite is Fe₂SiO₃.

A	True
B	False

Question 13 Explanation:

FeSiO₃ would be correct.

Question 14

What is the crystal system and the optic sign of the following crystal?

Image credit: Zoltai and Stout (1985) Mineralogy: Problems and solutions

A	Orthorhombic / negative
B	Orthorhombic / positive
C	Monoclinic / negative
D	Triclinic / negative
E	Triclinic / positive
F	Monoclinic / positive

Question 15

What are the bottom two end-members of Olivine ternary diagram?

A	Forsterite and Ferrosilite
B	Ferrosilite and Faylite
C	Forsterite and Enstatite
D	Ferrosilite and Enstatite
E	Forsterite and Faylite
F	Faylite and Enstatite

Question 16

The following interference diagram can be best described as...

A	a biaxial Bxa negative.
B	an uniaxial Bxa negative.
C	a biaxial Bxa positive.
D	an uniaxial optic axis.
E	a biaxial optic axis.

Question 17

What is the universally accepted standard thickness of a petrographic thin section?

A	30 000 nm
B	0.03 nm
C	0.003 mm
D	0.30 mm
E	0.35 mm

Question 17 Explanation:

Remember, 30 000 nm = 0.03 mm

Question 18

The length fast direction is at ___ degrees to the length slow direction.

A	45
B	between 45 - 90
C	180
D	90
E	between 90 - 180

Question 19

High temperature and/or dry conditions favors the growth of __I__ crystals over __II__ crystals.

A	I. orthopyroxenes II. clinopyroxenes
B	I. pyroxenes II. olivine
C	I. hydrous II. anhydrous
D	I. olivine II. pyroxenes
E	I. clinopyroxenes II. orthopyroxenes

Question 20

Which of the following planes lines on the [1 1 1] zone?

A	(212)
B	(112)
C	(132)
D	(122)
E	(121)

Question 21

Which of the following analytical methods should you use for determining the crystal structure of a mineral? (choose the best answer)

A	SEM (Scanning Electron Microscope)
B	Electron Microprobe
C	ICP and AAS
D	XRF (X-Ray Fluorescence)
E	X-ray Diffraction

Question 21 Explanation:

While none of the above techniques world provide good details on crystal structures, the X-ray Diffraction is the best choice.

Question 22

__I__ are low-T, slow cooled alkali feldspars and their Optic Axis Plane (OAP) is __II__ to 010.

A	I. Microcline and Orthoclase II. parallel
B	I. Microcline and Orthoclase II. perpendicular
C	I. Microcline and Sanidine II. parallel
D	I. Microcline and Sanidine II. perpendicular
E	I. Sanidine and Orthoclase II. perpendicular

Question 23

What is the best description for the following effect in Calcite crystals?

A	This is an optical property that would only occur in Calcite crystals. Hence it is a good property for mineral identification.
B	This is caused by the difference in velocities between the epsilon and omega rays.
C	This is a result of internal diffraction of natural light.
D	This is caused by the difference in Birefringence.
E	This is an optical property caused by non-visible UV light interacting with the visible light spectrum.

Question 24

The chemical formula for the Pyroxene end-member Enstatite is MgSiO₃.

A	True
B	False

Question 25

Alkali feldspars may have several different types of exsolutions. Which of the following type of exsolution can only be observed under X-ray techniques?

A	Antiperthite
B	Perthite
C	Cryptoperthite
D	Microperthite
E	Macroperthite

Question 26

What is the Miller index for 10a: 3b: 5c?

A	(1/10 1/3 1/5)
B	(3 10 6)
C	(5 3 10)
D	(10 3 5)
E	(1 5 3)

Question 27

What is the crystal system and the optic sign of the following crystal?

Image credit: Zoltai and Stout (1985) Mineralogy: Problems and solutions

A	Triclinic / positive
B	Orthorhombic / positive
C	Monoclinic / positive
D	Monoclinic / negative
E	Triclinic / negative
F	Orthorhombic / negative

Question 28

Polymorphism is caused by differences in thermodynamic properties at different P-T conditions.

A	True
B	False

Question 29

__I__ temperature reactions will result in __II__.

A	I. low II. disordered minerals.
B	I. high II. high symmetry.
C	I. high II. low symmetry.
D	I. low II. high symmetry.
E	I. high II. ordered minerals.

Question 30

The T-O-T offsets structures in clinopyroxenes are situated in such...

A	randomly arranged T-O-Ts alternates every two chains.
B	all facing the same direction.
C	alternating between positive and negative faces.
D	longer a - axis compared to the a-axis length of the orthopyroxenes.

Question 31

Minerals with same/similar structure but different compositions is known as...

A	disordered
B	ordered
C	isomorphs
D	polymorphs

Question 32

What is the chemical formula for Anthophyllite?

A	Ca₂Mg₅Si₈O₂₂(OH)₂
B	Fe₇Si₈O₂₂(OH)₂
C	Mg₇Si₈O₂₂(OH)₂
D	Ca₂Fe₅Si₈O₂₂(OH)₂

Question 33

Electromagnetic radiation is always....

A	destructive
B	confined and non-scattering
C	constructive
D	constructive and destructive

Question 34

The analytical methods, ICP and AAS will destroy the tested sample and often the same sample cannot be used for further analysis.

A	True
B	False

Question 35

Abundance of water in a olivine forming environment will result in formation of serpentine and talc.

A	False
B	True

Question 36

Does (123) plain lines in the [210] zone?

A	No
B	Yes

Question 36 Explanation:

No because (1X2) + (2X1) + (3X0) is not equal to zero.

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 36 questions to complete.

←

List

→

Return

Shaded items are complete.

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	End

Return

You may download this exam as a PDF file here.

Credits: Based on the excellent class notes provided by, Dr. Sytle Antao during Fall 2013.
FAQ | Report an Error.

Point group animation test run

Lab final cheat sheet

Min ID Chart — Download the PDF file of mineral identification chart. Also known as the “cheat sheets” or “cheat sheet”.

Sanuja Senanayake

Geology 423 Final Exam-University of Calgary

Go to: Midterm Exam

Geology (GLGY 423-UCAL) Final

Point group animation test run

Lab final cheat sheet

Standing on the shoulders of giants

Go to: Midterm Exam

Geology (GLGY 423-UCAL) Final

Point group animation test run

Lab final cheat sheet

Print/Share:

Standing on the shoulders of giants