Geology 381 Midterm II-University of Calgary

Notice

If you get a question wrong, you can still click on the other answers. This will open up hints and explanations(if available) with additional information.

Disclaimer: While every reasonable effort is made to ensure that the information provided is accurate, no guarantees for the currency or accuracy of information are made. It takes several proof readings and rewrites to bring the quiz to an exceptional level. If you find an error, please contact me as soon as possible. Please indicate the question ID-Number or description because server may randomize the questions and answers.

Go to: Midterm I | Final

Geology (GLGY 381-UCAL) Midterm Exam II

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 381-UCAL) Midterm Exam II.

You scored %%SCORE%% out of %%TOTAL%%. With incorrect multiple attempts your score is %%PERCENTAGE%%

Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

The process which the pressure difference drives the water from cut bank to point bar is caused by... (ID-SSM2-44)

A	sediment accumulation.
B	gravitational force.
C	helicoidal flow.
D	gravitational flow.

Question 2

Multiple interconnected channels are most likely to form within.... (ID-SSM2-78)

A	anastomosing rivers.
B	meandering rivers.
C	underwater fluvial deposits.
D	overbanks of lakes.

Question 3

A Professional Geologist have made the following observations: (ID-SSM2-24)
-active and extinct distributaries
-poorly sorted and mostly matrix supported
-reverse grading in basal section
-very steep surface with no vegetation
A possible environment for such observations could be....

A	humid-desert extreme weather dominated river bed
B	debris flow dominated fan
C	high sediment load river bed
D	stream flow dominated fan
E	low sediment load river bed

Question 4

What type of flow is turbidity flow? (ID-SSM2-01)

A	Sediment Gravity Flow
B	Debris Flow
C	Liquified Flow
D	Density Flow

Question 5

On the following diagram, the type of delta that would formed at point 2 (blue) can be described as... (ID-SSM2-42)

A	wave influx delta with a shape of a bird's foot.
B	sediment impact delta with a shape of a bird's foot.
C	wave influx delta with a shape of a cupcake.
D	tidal flow delta with a shape of a cupcake.

Question 6

How is Alizarin Red-S staining agent is used to identify dolomite? (ID-SSM2-62)

A	It will increase the relief by staining the dolomite grain boundaries.
B	It will stain dolomite red but will not stain the other carbonates.
C	It will not stain dolomite but colours the other carbonates pink.
D	It will react with dolomite and stain it in green.

Question 7

Which direction a facies sequences can propagate? (ID-SSM2-29)

A	vertically and laterally
B	vertically downwards
C	vertically upwards
D	laterally left or right

Question 8

When working on a scientific project,__A__ comes before__B__. (ID-SSM2-12)

A	A. observations B. interpretations
B	A. observations B. analysis
C	A. alcohol B. dirty girls
D	A. analysis B. observations
E	A. interpretations B. observations

Question 9

What is the best reasonable paleoenvironment interpretation for the following geological observations? (ID-SSM2-81)
-Several channels filled with sandy to muddy deposits
-Most of the channel fills overlaps each others
-Both vertically and laterally the channels are closer to each other

A	Must have been a submarine deposit channels within a large underwater deltaic environment.
B	Several rivers must have been cut across the paleo flood plane at the same period of time, resulting multiple channels.
C	Sediment load must have been enriched in sand relative to muddy and other materials.
D	River avulsion must have occurred with a much lower rate of channel fill and higher subsidence rate relative to the rate of overbank fill.
E	River avulsion must have occurred with a much higher rate of channel fill and slow subsidence rate relative to the rate of overbank fill.

Question 10

Alluvial fans dominated by debris flows tend to form with __A__, while stream-flow dominated fans tend to form with __B__. (ID-SSM2-25)

A	A. shallower slopes in a small area B. steeper slopes in a wide area
B	A. steeper slopes in a wide area B. shallower slopes in a small area
C	A. steeper slopes in a small area B. shallower slopes in a small area
D	A. shallower slopes in a small area B. steeper slopes in a small area
E	A. steeper slopes in a small area B. shallower slopes in a wide area

Question 11

What is Eustasy? (ID-SSM2-31)

A	It is the term given to absolute sea level.
B	It is a drug that most geologists take to get high in the woods.
C	It is the term given to local sea level.
D	It is the term given to local base level of a fluvial system.

Question 12

Dedolomitisation result in which of the following? (ID-SSM2-76)

A	Replacement of dolomite by anhydrites.
B	Calcium sulphate enrichment of groundwater.
C	Decrease in the normal level of water table.
D	Increase in the normal level of water table.
E	Increase the salinity of the groundwater.

Question 13

Your job title is "Master of Exploitation of Natural Resources". If you were to search for hydro-carbons, which would be the best place to start(with the lowest cost to the company)? (ID-SSM2-27)

A	an alluvial fan
B	on a large vegetated point bar
C	an oxbow lake
D	on a river bed

Question 13 Explanation:

An oxbow lake is the best for coal formation. In general it takes less resources(both human and technological) to extract coal from an oxbow lake than extract oil from an alluvial fan. This question is testing your IQ. 🙂

Question 14

What would you always expect to find in an alluvial fan? (ID-SSM2-18)

A	Avulsion
B	Extinct channels.
C	Tributaries
D	Distributaries
E	Overbanks

Question 15

It is impossible to have a base level lower than the sea level. (ID-SSM2-14)

A	False
B	True

Question 15 Explanation:

Because the base level is actually the LOCAL lowest point in a river/lake. Imagine if you have a river 100s of km long and base level in can be lower than sea level in some area, but as long as gradient of the overall slope is downwards, the water will flow.

Question 16

On tidally dominated delta formations, lagoons can be identified by their fine grained mud (Fm) and/or rich organic content. (ID-SSM2-58)

A	False, that's a longitudinal bar.
B	False, that's a point bar.
C	True

Question 17

As the amount of evaporation increases in lakes, the type of mineral precipitation varies. Which of the following has the correct order of mineral precipitation as lakes environment move from low evaporation to high evaporation? (ID-SSM2-94)

A	Calcium carbonate - Halite - Sodium sulphates (eg. mirabilite) - Gypsum
B	Gypsum - Sodium sulphates (eg. mirabilite) - Calcium carbonate - Halite
C	Calcium carbonate - Sodium sulphates (eg. mirabilite) - Gypsum - Halite
D	Calcium carbonate - Gypsum - Sodium sulphates (eg. mirabilite) - Halite
E	Gypsum - Calcium carbonate - Sodium sulphates (eg. mirabilite) - Halite

Question 18

Which of the following characteristic of lake deposit is incorrect? (ID-SSM2-95)

A	Typically sands are moderately well sorted.
B	Dominated by sandstone, mudstone, fine-grained limestones and evaporites lithologies.
C	Very high degree of palaeocurrents preservation with extensive paleocurrent networks.
D	Facies an be best described as commonly occur with fluvial deposits, evaporites and associated with aeolian facies.
E	Often wave ripples and very fine parallel lamination are observed.

Question 18 Explanation:

The lake environments are relatively clam. Hence, development of palaeocurrents is very minimal and in most cases insignificant. While clam waters are good for preservation of sedimentary structures, palaeocurrents are not usually observed in lake type settings.

Question 19

Turbidity flows can most likely occur in what kind of environment? (ID-SSM2-08)

A	muddy rivers enter the lake
B	areas with high friction
C	rivers with low sediment load
D	this question is stupid

Question 20

Choose all the correct statements. (more than one answer) (ID-SSM2-49)

A	anastomosing rivers are avulsion dominated rivers.
B	imbricated clasts can be observed om gravel braided system.
C	ε cross beds form in the point bar side of a meandering river.
D	braided rivers are part of alluvial systems.
E	point bar is an area of high erosion.

Question 21

Where can you find the apex of the alluvial fan? (ID-SSM2-19)

A	Close to the canyon.
B	Close to an extinct channel.
C	In the most expanded area.
D	Close to the lowest base level.

Question 21 Explanation:

Apex is the first point in which the flow expansion occur as a result of widening the area of flow.

Question 22

What are ephemeral lakes? (ID-SSM2-89)

A	Lakes that form in a volcanic crater or caldera.
B	Lake that are hydrologically closed and produce large deposits of precipitate minerals.
C	Lakes with very high heat capacity hence able to reduce the temperate of the surrounding regions.
D	Lakes that are temporary bodies of water that exist for short periods of time.

Question 23

Tidal inlets form under____ (pick the most suitable) (ID-SSM2-60)

A	low energy conditions.
B	high energy conditions.
C	high density flows.
D	low density flows.

Question 23 Explanation:

While density of the flow may play a role in how inlets in a tidally dominated deltas, it is the high energy condition drives the mechanism for the formation of inlets.

Question 24

On the following diagram, the type of delta that would formed in section A is.... (ID-SSM2-40)

A	fluvial dominated.
B	alluvial dominated.
C	wave dominated.
D	tidal dominated.

Question 25

The process of compaction will result in... (choose the most suitable) (ID-SSM2-09)

A	reduce porosity causing beds to be thinner and dehydrated.
B	creates facies due to increase in temperature and pressure.
C	increase in volume as a direct result of increase in pressure due to burial.
D	precipitation of minerals into the pore spaces reducing the porosity.

Question 25 Explanation:

Few answers above can be considered as a right answers, but only one choice can be considered by technical definition.

Question 26

Walther's law state... (ID-SSM2-30)

A	high energy currents can flow upstream, if the total energy of the current is higher than the gravitational gradient.
B	only beds with above 6 cm in thickness can be consider as a facies.
C	rise in sea level cause regression.
D	the vertical succession of facies reflects lateral changes in environment.

Question 26 Explanation:

Another way to state this would be; only those facies that were deposited side-by-side may be juxtaposed vertically.

Question 27

Which type of alluvial fans most likely to preserve imbrication of clasts and up stream cross-stratification? (ID-SSM2-85)

A	Channel banks
B	Stream-channel fans
C	Subaerial debris flows
D	Sheetflood deposition

Question 28

Due to modern day global warming, the change in overall global sediment accommodation space has undergone.... (ID-SSM2-15)

A	regression
B	transgression
C	subsidence
D	base level increase
E	erosion

Question 29

Which of the following describe oncoids? (ID-SSM2-66)

A	Bodies of calcium carbonate less than 2mm in diameter and form by the precipitation of calcium carbonate.
B	Layers bound by cyanobacteria found as clasts within carbonate sediments.
C	Planktonic yellowgreen algae that are extremely important contributors to marine sediments.
D	Very fine grained material that precipitate by the breakdown of skeletal fragments.
E	Fragments of calcium carbonate material that has been partly lithified.

Question 30

In general, rivers are stable systems. (ID-SSM2-54)

A	False
B	True

Question 31

Cyanobacterial communities that have an irregular rather than layered form is known as... (ID-SSM2-63)

A	Oncoids
B	Stromatoporoids
C	Stromatolites
D	Ahermatypic serpulids
E	Thrombolites

Question 32

The submarine delta deposits from when... (ID-SSM2-47)

A	density of effluent < density of the ambient
B	density of effluent/density of the ambient = infinity
C	density of effluent > density of the ambient Hint: aka hyperpycnal flow
D	density of effluent = density of the ambient

Question 32 Explanation:

Density of effluent (river water) is higher than the density of the ambient (sea water) causing river sediments to transport further and deposit in the ocean.

Question 33

These type of fragments commonly found within limestone are faecal pellets of marine organisms such as gastropods. (ID-SSM2-64)

A	Peloids
B	Ooids
C	Pisoids
D	Oncoids

Question 34

How is scars different from oxbow lakes? (ID-SSM2-33)

A	They are the same thing, scars formed in dry-humid environment and oxbow lakes formed in wet environments.
B	Scars are produced by braided rivers and oxbow lakes are produced by meandering rivers.
C	Scars and oxbow lakes are produced by meandering rivers. The difference is where oxbow lakes are filled with water.
D	Scars are produced by anastomating rivers and oxbow lakes are produced by meandering rivers.

Question 34 Explanation:

aka meandering scars

Question 35

Which of the following would increase the sediment accommodation space? (ID-SSM2-53)

A	subsidence
B	uplift
C	increase in elevation
D	increase in sediment load Hint: this will decrease the accommodation space due to higher rate of sed accumulation.

Question 36

What is the difference between Calcite and Aragonite? (ID-SSM2-61)

A	Calcite is calcium carbonate, CaCO₃ while aragonite is iron carbonate, FeCO₃.
B	Calcite is a carbonate mineral while aragonite is a silicate mineral.
C	Calcite has a different chemical properties than aragonite because calcite has an extra calcium ion.
D	Calcite is calcium carbonate, CaCO₃ while aragonite is calcium magnesium carbonate, CaMg(CO₃)₂.
E	Calcite has a trigonal crystal form, aragonite has an orthorhombic crystal form.

Question 37

Chert is mostly composed of which of the following mineral? (ID-SSM2-72)

A	Apatite
B	Quartz
C	Epsomite
D	Glass
E	Halite

Question 38

Sandy braided river systems will form __A__ and gravel braided rivers systems will form __B__. (ID-SSM2-56)

A	A. levees B. point bars.
B	A. stable channels B. unstable channels
C	A. transverse bars B. longitudinal bars
D	A. longitudinal bars B. transverse bars
E	A. unstable channels B. stable channels

Question 39

In lakes where sediment plumes and turbidity currents are the main transport mechanisms... (ID-SSM2-91)

A	shallow lake facies will consist of very finely laminated muds deposited from suspension alternating with thin graded turbidites.
B	shallow lake facies will consist of alternating large scale muddy beds and sandy beds.
C	None of the answers are correct.
D	deep lake facies will consist of very finely laminated muds deposited from suspension alternating with thin graded turbidites.
E	deep lake facies will consist of alternating large scale muddy beds and sandy beds.

Question 40

This is an areal image taken in 1996 of a geologic feature in Skeidararsandur (Iceland). What is the best interpretation for this image? (ID-SSM2-48)

Copyrighted to Magnus Tumi Gumundsson and Finnur Palsson

A	Delta formed due to tidal flow
B	Delta formed due to hyperpycnal flow
C	Alluvial fan formed by a stream with heavy sediment load
D	Delta formed due to hyperpycnal flow
E	Alluvial fan formed by a stream with high density sediment load

Question 40 Explanation:

This is a difficult question, but a fair question.

Question 41

Which of the following is associated with lake turbidite deposits? (ID-SSM2-90)

A	Epilimnion waters
B	Hypolimnion waters
C	Sediment load dominated by fine grains
D	Oxic environment
E	Thermocline waters

Question 41 Explanation:

Hypolimnion = cold water and it is below the thermocline. It is also anoxic.

Question 42

On the following diagram, the type of delta that would formed at point 3 (blue) can be described as... (ID-SSM2-43)

A	tidal energy based delta (smear)
B	wave energy based delta (cupcake)
C	tidal energy based delta (bird's foot)
D	wave energy based delta (smear)

Question 43

Majority of modern day seawater is concentrated with which of the following ion? (ID-SSM2-69)

A	Magnesium
B	Sodium
C	Chlorine
D	Potassium
E	Calcium

Question 44

On a sandy braided river system, the slip face would form on transverse bars on the.... (ID-SSM2-55)

A	left side in N. America and right side in Australia.
B	upstream side.
C	downstream side.
D	right side in N. America and left side in Australia.
E	left and right side, parallel to the flow.

Question 45

On the following diagram, the type of delta that would formed in section B is.... (ID-SSM2-39)

A	tidal dominated.
B	alluvial dominated.
C	wave dominated.
D	fluvial dominated.

Question 46

According the the classification of trace fossils based on interpretation of the activity of organism, which of the following is typically associated with crawling, gracing and feeding traces? (ID-SSM2-96)

A	Dominichnia
B	Passichnia
C	Repichinia
D	Fodinichina
E	Cubichina

Question 47

Which of the following is indicative of phreatic zone sediments? (ID-SSM2-77)

A	Presence of globular masses of digenetic minerals within matrix.
B	Complete dolomitisation.
C	Saturated zones of calcite within the matrix.
D	Isopachous cement between grains.
E	Meniscus cements between grains.

Question 48

Diagenesis is the process in which... (ID-SSM2-05)

A	soil created.
B	sediments get buried.
C	grains transported to a new environment.
D	original horizontally changed due to a tectonic event.

Question 48 Explanation:

To be clear; Diagenesis is the process of compaction and lithofication of sediments into sedimentary rocks.

Question 49

According to Dunham Classification, this type of rock has an extensive organic framework. (ID-SSM2-67)

A	Boundstone
B	Rudstone
C	Carbonate mudstone
D	Grainstone
E	Wackestone

Question 49 Explanation:

Some instructors do not require students to know this.

Question 50

If you have to identify the single most cause(while it is a combination of many) of alluvial fans formation, it would be... (ID-SSM2-17)

A	the gain of energy(velocity) of the load bearing currents.
B	the change in base level.
C	the loss of energy(velocity) of the load bearing currents.
D	the change in elevation.

Question 50 Explanation:

This is a tricky question... While several answers above can be right, the fundamental cause is the velocity change which in trigger density change causing deposition.

Question 51

When you move from bottom to top in ideal turbidite Bouma sequence (A -> E), the flow velocity will... (ID-SSM2-03)

A	decrease
B	fluctuate between high and low
C	remain consent
D	increase
E	None of the answers are correct because it could either increase or decrease depending on the environment.

Question 52

Inconsistent change in water level is the the primary driving force for meandering rivers. (ID-SSM2-35)

A	True
B	False

Question 52 Explanation:

Centrifugal force(F_c) is the the primary driving force for meandering rivers. While gravity also play a role, it is minor compared to F_c because the low-slope.

Question 53

Where would you expect braided rivers to form? (ID-SSM2-79)

A	Between meandering section and the upstream of rivers with high sediment load.
B	At low gradient slopes near the mouth of the river with high sediment load.
C	At low gradient slopes near the mouth of the river with low sediment load.
D	Between meandering section and the upstream of rivers with low sediment load.

Question 54

Which of the following is the best possible location for a oil (petroleum) exploration? (ID-SSM2-73)

A	Older alluvial fan
B	Older point bar
C	Older oxbow lake
D	Younger/modern point bar
E	Younger/modern river bed

Question 55

Typically what is the radius of debris flow alluvial fans? (ID-SSM2-82)

A	Less than 20 meters.
B	Hundreds of thousands of kilometers.
C	100s of meters to a few kilometers.
D	One to ten kilometers.
E	1 km to tens of kilometers.

Question 55 Explanation:

As a good Geologist, you should know the typical shapes and sizes for different types of alluvial fans. This will help identify different environments and improve geological interpretations.

Question 56

What is the most common type of cements in nature? (ID-SSM2-07)

A	silica and pyrite
B	calcite and silica
C	pyrite and calcite
D	silica and iron

Question 57

What is cementation? (ID-SSM2-06)

A	Precipitation of minerals into the pore spaces increasing the porosity.
B	Addition of chemicals from outside of the strata into the pore spaces increasing the porosity.
C	Addition of chemicals from outside of the strata into the pore spaces reducing the porosity.
D	Precipitation of minerals into the pore spaces reducing the porosity.

Question 58

What is the most common type of flow that contributes to the creation of alluvial fans? (ID-SSM2-22)

A	sediment-gravity flows
B	density flows
C	diagenesis flow
D	oscillatory flows

Question 59

Which of the following describe ooids? (ID-SSM2-65)

A	Bodies of calcium carbonate less than 2mm in diameter and form by the precipitation of calcium carbonate.
B	Layers bound by cyanobacteria found as clasts within carbonate sediments.
C	Planktonic yellowgreen algae that are extremely important contributors to marine sediments.
D	Fragments of calcium carbonate material that has been partly lithified.
E	Very fine grained material that precipitate by the breakdown of skeletal fragments.

Question 60

A Geologist noticed that Bouma sequence in the area only indicate deposition of lower units (ex A and B only). He/she is most likely at the... (ID-SSM2-04)

A	beginning of the flow.
B	end of flow.
C	middle of the flow.

Question 61

How large is the lateral width of a crevasse splay(generally)? (ID-SSM2-37)

A	100s of ms
B	10 of cms
C	It can varies widely between 10 of cms to 1000s of Kms depend on the environment.
D	1000s of Kms
E	100s of Kms

Question 62

Please the following items from bottom to top (aka, A to E) according to ideal Bouma sequence. (ID-SSM2-57)

1. normally graded bed (fining upwards)
2. silt and mud
3. ripples
4. lamination
5. fine lamination

A	2 (bottom) --> 4 --> 3 --> 5 --> 1 (top)
B	3 (bottom) --> 4 --> 1 --> 2 --> 5 (top)
C	1 (bottom) --> 4 --> 3 --> 5 --> 2 (top)
D	1 (bottom) --> 4 --> 5 --> 3 --> 2 (top)

Question 62 Explanation:

more info-external link

Question 63

What is the difference between avulsion and migration? (ID-SSM2-38)

A	Avulsion is the rapid change of a river channel and usually caused by a sudden event such as a flood or an earthquake. Migration is the normal lateral motion of an alluvial river channel across its floodplain.
B	Avulsion and migration both caused by the rapid change of a river channel. But avulsion is found in braided rivers and migration found in meandering rivers.
C	Migration is the rapid change of a river channel and usually caused by a sudden event such as a flood or an earthquake. Avulsion is the normal lateral motion of an alluvial river channel across its floodplain.
D	Avulsion and migration both caused by the rapid change of a river channel. But migration is found in braided rivers and avulsion found in meandering rivers.

Question 64

In alluvial fan transverse cross sections a geologist will___. (ID-SSM2-20)

A	observe a no change in base level or overall elevation since the sediments get deposited in a rapid rate.
B	observe a drop in base level moving downstream (negative change in slope).
C	observe an increase and then a decrease in base level moving downstream (like a bra cup).
D	observe a increase in base level moving downstream (positive change in slope).

Question 65

Meandering rivers most likely to formed in areas with... (ID-SSM2-34)

A	low gradient.
B	shallow unstable channels.
C	rivers with high width to depth ratio.
D	stable channels carrying a lose sediment load (such as sand/mud).
E	high gradient.

Question 65 Explanation:

Low gradient=low width to depth ratio. In some areas the difference is so small, it is harder for a Geologist to find the downstream direction (assuming river is not flowing).

While the meander is caused by several factors; the main factor is the low slope of the channel.

Question 66

What type of environment would you expect to find this type of facies? (ID-SSM2-46)

A	meandering river
B	wave dominated delta
C	braided river
D	alluvial fan
E	tidal dominated delta
F	fluvial dominated delta

Question 67

A geological formation can have several lithofacies. (ID-SSM2-28)

A	False
B	True

Question 68

Where can a sheetflood (sheet erosion) can be observed? (ID-SSM2-26)

A	poorly-sorted load dominated currents
B	debris flow dominated fans
C	gradual erosional environments such as a beach/river bed.
D	all alluvial fans
E	stream-flow dominated fans

Question 69

Pedogenesis is caused by which of the following processes within sediments? (ID-SSM2-86)

A	Chemical and nuclear
B	Physical, chemical and biological
C	Chemical and mechanical
D	Physical and chemical
E	Chemical and biological

Question 70

Which of the following statement is true about facies and/or beds? (ID-SSM2-10)

A	Bed are vertical planer features resulted from recent geologic activities.
B	Beds are composed of several facies.
C	A rock or lithologic unit that has consistent properties is known as a facies.
D	Facies only form in complex geologic environments.

Question 71

What is flow expansion? (ID-SSM2-21)

A	Flow expansion is caused by decrease in area of the fluid flow.
B	Flow expansion is caused by increase in sediment load of the fluid flow.
C	Flow expansion is caused by increase in area of the fluid flow.
D	Flow expansion is caused by decrease in sediment load of the fluid flow.

Question 72

Turbidity flows result in deposits known as turbidites. In the ideal turbidite sequence, where would you expect to find ripples? (ID-SSM2-02)

A	Section A; the first one from the bottom.
B	Section D; the fourth one from the bottom.
C	Section C; the third one from the bottom.
D	Section B; the second one from the bottom.
E	Section E; the fifth one from the bottom.

Question 73

Alluvial fan deposits are typically associated with ______ facies and rivers deposits are typically associated with ______ facies. (ID-SSM2-83)

A	delta , ephemeral lake
B	estuarine , sheet flood
C	ephemeral lake , estuarine
D	sheet flood , aeolian dunes

Question 74

Imbricated clasts often can be found in this type of system. (ID-SSM2-45)

A	wave energy delta system.
B	sandy braided system.
C	gravel braided system.
D	tidal energy delta system.

Question 75

______ is an important source of industrial potash that occurs associated with halite. (ID-SSM2-71)

A	Apatite
B	Sylvite
C	Gypsum
D	Selenite
E	Epsomite

Question 76

Large scale sandy deposits, important to the petroleum industry, are most likely to be found within which of the following river system sub-environments? (ID-SSM2-75)

A	Levees
B	Floodplains
C	Crevasse Splays
D	Channels

Question 77

Which of the following describes characteristics of floatstones according to Dunham Classification? (ID-SSM2-68)

A	Matrix supported with more than 10% grains.
B	Mud supported with more than 10% grains.
C	Grain supported with some mud within the matrix.
D	Mud supported with less than 10% grains.
E	Organic framework supported with original components organically bounded.

Question 77 Explanation:

Some instructors do not require students to know this.

Question 78

What is anhydrite? (ID-SSM2-70)

A	It is a type of quartz that lacks water.
B	It is the fibrous mineral version of halite.
C	It is the dehydrated and fibrous version of sylvite.
D	It is the dehydrated version of gypsum.
E	It is a type of precipitate occurs between grains of iron rich sediments.

Question 79

When moving from A to B on the following flow chart (with respect to deltas), (ID-SSM2-52)

(A) Channels --> Levees --> Crevasse splay --> Floodplain (B)

A	the grain size increases.
B	the grain size decreases.
C	the density decreases.
D	the density increases.
E	the bioturbation decreases.

Question 80

What can be interpreted from presence of histosols in a core sample? (ID-SSM2-87)

A	The area must have been arid.
B	This particular core section must have been taken from the distal edge of a weave dominated delta deposit.
C	The area must have been concentrated with poorly developed soil.
D	This particular core section represents a channel bar deposit.
E	The area must have been enriched in organic matter.

Question 81

Where would you most likely to find palustrine environments? (ID-SSM2-92)

A	At the mouth of rivers that carry large sediment load.
B	At the toe of wave dominated deltas with large scale muddy deposits.
C	Areas of mixing salt water with fresh water.
D	Within deep channels in a braided river system.
E	Lake margins with very gentle slopes.

Question 82

A core sample can be exclusively used to identify the depositional environment with strong geologic constraints. (ID-SSM2-11)

A	False
B	True if the core penetrated across different strata.
C	True if the core is taken perpendicular to the natural depositional surfaces.
D	True if the core samples are taken within few lateral meters from each other.

Question 82 Explanation:

A core sample by itself cannot be used to identify the depositional environment. Several samples are needed to analyze the geological conditions in a given area.

Question 83

Ogoki River hydro power dam in Ontario will result in___. (ID-SSM2-16)

A	fall in local base level.
B	rise in local base level.
C	fall in global base level.
D	rise in global base level.

Question 84

What is the process of transgressions? (ID-SSM2-13)

A	Landward movement of the shore line often as a direct result of fall in sea level.
B	Landward movement of the shore line often as a direct result of rise in sea level.
C	Seaward movement of the shore line often as a direct result of rise in sea level.
D	Seaward movement of the shore line often as a direct result of drop in sea level.

Question 85

Crevasse splays are deposits found in __A__ systems and generally have __B__ grains than flood plain facies. (ID-SSM2-36)

A	A. alluvial B. finer
B	A. fluvial B. coarser
C	A. fluvial B. finer
D	A. alluvial B. coarser

Question 86

Which of the following is a characteristic of wave dominated delta? (ID-SSM2-84)

A	Flat or straight distal edge.
B	Large distributary channels developed well into the distal regions.
C	Increase in sediment accumulation towards the distal edge due to sandy deposits.
D	Lobe shaped bay fill towards the sea with a shape like a "bird's foot".

Question 87

Where do you expect the highest pressure on a meandering system? (ID-SSM2-51)

A	Near the outer cut bank. Hint: aka outer bank
B	Shallowest part of the river.
C	Near the point bar.
D	Floodplains on both sides of the river.

Question 87 Explanation:

This pressure difference result in helicoidal flow which cause erosion on the cut bank(aka outer bank) of the meandering system.

Question 88

Which of the following describes Banded Iron Formations or BIFs? (ID-SSM2-74)

A	BIFs most likely formed in deep basins with very high iron rich organic sediment influx.
B	BIFs forms in modern environment, but at much smaller scale and rate.
C	Typically thin iron rich beds are composed of haematite rich sediments.
D	Iron within BIFs must have been oxidized before they were deposited as bands of thin beds.

Question 89

Alluvial fans are differ from deltas because alluvial fans are formed as a direct result of flow expansion. (ID-SSM2-50)

A	False
B	True

Question 89 Explanation:

Both alluvial fans AND deltas are formed as a direct result of flow expansion. However, alluvial fans are deposited at the mouth of the canyon when it enters a low lying land while deltas are formed at the mouth of the river where a body of sediments deposited in a large body of standing water (ocean, lake).

Question 90

What is the primary process that derive formation of rhizocretions? (ID-SSM2-88)

A	Fall of water table
B	Gravity and pressure due to overburden sediment load
C	Physical weathering
D	Rise of water table
E	Chemical weathering

Question 91

What are Tufa or travertine? (ID-SSM2-93)

A	Inorganic precipitate of calcium carbonate.
B	Organic precipitate of calcium carbonate.
C	A type of sediment that was undergoing transition to coal from peat.
D	Deep lake facies characterized by high concentrations of oncoids.
E	Clastic lake margin deposits.

Question 92

An oxbow lake most likely to be formed... (ID-SSM2-32)

A	near a meandering river.
B	in a braided river.
C	in the anastomosing river.
D	near a braided river.
E	in a high density flow dominated stream.

Question 93

Bonus; Calgary Elbow River will fall under what type of river system? (ID-SSM2-59)

A	braided
B	meandering
C	anastomosing
D	graded

Question 94

On the following diagram, the type of delta that would formed in section C is__I__ and these deltas become__II__. (ID-SSM2-41)

A	I. tidal dominated II. estuary
B	I. tidal dominated II. flood plains
C	I. tidal dominated II. flood plains
D	I. wave dominated II. estuary

Question 94 Explanation:

Estuary is an area which mixing of salt and fresh water can occur as a direct result of low slope and reverse(landwards) ocean tides.

Question 95

How does large scale oxbow lakes get filled up by sediments? (ID-SSM2-80)

A	During a flooding event.
B	Development of soil form vegetation. Hint: Yes, but typically for smaller oxbow lakes.
C	Collapse of sediments from overbanks.
D	Gravel deposits through biological activities in the surrounding area.

Question 96

A fan delta is a depositional feature that is formed where an alluvial fan develops directly in a body of standing water(lake/ocean) as a result of streams originating from a steep environment. (ID-SSM2-23)

A	True
B	False

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

There are 96 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	37	38	39	40
41	42	43	44	45
46	47	48	49	50
51	52	53	54	55
56	57	58	59	60
61	62	63	64	65
66	67	68	69	70
71	72	73	74	75
76	77	78	79	80
81	82	83	84	85
86	87	88	89	90
91	92	93	94	95
96	End

Return

Credits: Based on the excellent class notes provided by, Dr. Melissa Giovanni during Fall 2012. This version has been updated on between January and February 2016.
FAQ | Report an Error

My personal advice: Since the exams are written, if you score less than 90% on the following MC questions, seriously reconsider your study strategies for this class.

Sanuja Senanayake

Geology 381 Midterm II-University of Calgary

Go to: Midterm I | Final

Geology (GLGY 381-UCAL) Midterm Exam II

Some of the Lab Final sample images | Click here

Standing on the shoulders of giants

Go to: Midterm I | Final

Geology (GLGY 381-UCAL) Midterm Exam II

Some of the Lab Final sample images | Click here

Print/Share:

Standing on the shoulders of giants