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Questions and Answers
What does sphericity refer to in the context of sediments?
What does sphericity refer to in the context of sediments?
- The degree of uniformity of grain sizes of sediments
- The density caused by the energy of the transporting medium
- The sharpness of the sediment’s edges and corners
- The degree by which a material approaches the shape of a sphere (correct)
What does sorting describe in relation to sediments?
What does sorting describe in relation to sediments?
- The degree of uniformity of grain sizes of sediments (correct)
- The degree by which a material approaches the shape of a sphere
- The sharpness of the sediment’s edges and corners
- The density caused by the energy of the transporting medium
What happens when the velocity of the transporting medium becomes low?
What happens when the velocity of the transporting medium becomes low?
- Lighter sediments are left behind and begin to be deposited
- Sand and finer sediments are deposited first
- Gravel and coarser particles are deposited first
- Heavier sediments are left behind and begin to be deposited (correct)
How are gravel and coarser particles mostly transported?
How are gravel and coarser particles mostly transported?
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What is the impact of excessive sedimentation on corals?
What is the impact of excessive sedimentation on corals?
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What type of pollution occurs when silt or clay dominates a body of water?
What type of pollution occurs when silt or clay dominates a body of water?
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Study Notes
Sediment Characteristics
- Sphericity refers to the degree to which a sediment particle approaches a spherical shape.
Sediment Transport
- Sorting describes the distribution of sediment grain sizes in a deposit.
Sediment Deposition
- When the velocity of the transporting medium (e.g., water or wind) becomes low, sediments are deposited.
Sediment Transport Mechanisms
- Gravel and coarser particles are mostly transported by rolling or sliding along the bed of a river or ocean floor.
Impact of Sedimentation on Corals
- Excessive sedimentation can smother corals and impede light penetration, which is essential for their survival.
Water Pollution
- When silt or clay dominates a body of water, it can cause turbidity pollution, which reduces light penetration and affects aquatic life.
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