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GLY 3202 C - Exam 3 Questions and Answers
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How would you classify a sediment containing many elongated grains with very sharp corners and edges? - ️️Angular True or false? Dissolved ions are transported into the ocean and re-precipitated as mineral material by marine organisms. - ️️True What is the difference between weathering ...

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  • November 12, 2024
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  • 2024/2025
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GLY 3202 C - Exam 3
How would you classify a sediment containing many elongated grains with very sharp
corners and edges? - ✔️✔️Angular

True or false? Dissolved ions are transported into the ocean and re-precipitated as
mineral material by marine organisms. - ✔️✔️True

What is the difference between weathering and erosion? - ✔️✔️Weathering relates to
the breakdown of rocks and erosion the transport of those materials.

Which of the following mechanisms would be described as chemical weathering? -
✔️✔️Acid rain dissolves limestone to leave holes.

Which of these minerals is the most stable at the Earth's surface? - ✔️✔️Quartz

Which of these minerals would be the least susceptible to weathering? -
✔️✔️Hardness of 6, poor cleavage.


What is a siliciclastic sedimentary rock? - ✔️✔️A rock formed from inorganic detrital
grains.

How would you classify a rock made predominantly of quartz and feldspar detrital
grains? - ✔️✔️Siliclastic


Which grain size classification can be described as pebble, cobble or boulder? -
✔️✔️Gravel

How would you classify a sediment with framework grain sizes including fine sand and
cobbles? - ✔️✔️Poorly sorted

Which of these sorting classifications has been transported and re-worked the least? -
✔️✔️Poorly sorted


Which of the sediments described below has been transported the furthest? -
✔️✔️Well sorted small round grains.

What sedimentary feature is formed by ice-carried blocks scraping along a rock
surface? - ✔️✔️Striations

, In which sedimentary environment is gravity the most important influence on sediment
transport? - ✔️✔️Cliff face

Which particle would be more easily eroded and transported by wind? - ✔️✔️Small
less dense particle.

Which type of sedimentary layering is formed by the lateral migration of ripples along a
river bed? - ✔️✔️Cross-bedding


What environmental conditions are indicated by the presence of ooids in a sedimentary
rock? - ✔️✔️Strong currents.

Which type of sedimentary rock forms from the burial and compaction of vegetation
prior to decay? - ✔️✔️Coal

What process regulates the concentration of Ca2+ and Na+ ions in solution in
seawater? - ✔️✔️Ions are removed by precipitation.

Which conditions are required to generate hydrocarbons from buried organic matter? -
✔️✔️Heat and pressure

What term is used to denote a distinct layer in a sedimentary rock distinguished by
color, grain size or other physical/chemical property? - ✔️✔️Sedimentary bed.

True or false? The sequence of layering in a sedimentary rock can provide an absolute
age for individual beds. - ✔️✔️False

Is the erosion of previously deposited sedimentary sequences more associated with
marine regression or transgression? - ✔️✔️Marine regression.

What process involved the secondary replacement of Ca ions with Mg ions during
diagensis? - ✔️✔️Dolomitization

What happens to sediment porosity during lithification? - ✔️✔️Decreases.

Which of the following mechanisms would be described as physical weathering? -
✔️✔️Freeze-thaw process widens fractures in rocks.

Which of these minerals would be the least susceptible to weathering? -
✔️✔️Hardness of 6, poor cleavage.

True or false? Dissolved ions are transported into the ocean and re-precipitated as
mineral material by marine organisms. - ✔️✔️True

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