Sedimentary Structures Quiz
Test your knowledge of sedimentary structures in geology. Please answer all questions below.
What is a primary sedimentary structure?
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A feature formed during sediment deposition
A feature formed after lithification
A volcanic rock texture
Which of the following is an example of a cross-bedding structure?
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Inclined layers within horizontal beds
Flat horizontal layers
Vertical fractures
Ripple marks are most commonly formed by which process?
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Water or wind movement
Glacial abrasion
Magma intrusion
Which sedimentary structure indicates the direction of ancient water flow?
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Current ripple marks
Mud cracks
Concretions
On a scale of 1 to 5, how confident are you in identifying graded bedding?
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1
2
3
4
5
Match the sedimentary structures to their descriptions.
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Rows
Cross-bedding
Mud cracks
Concretions
Description
Inclined layers from shifting currents
Polygonal cracks from drying
Rounded structures from mineral growth
Inclined layers from shifting currents
Polygonal cracks from drying
Rounded structures from mineral growth
Inclined layers from shifting currents
Polygonal cracks from drying
Rounded structures from mineral growth
Which of the following best describes graded bedding?
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Sediment size decreases upward
Sediment size increases upward
Uniform grain size throughout
Choose all environments where mud cracks are likely to form.
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Lake beds
Desert flats
Deep ocean floor
Briefly describe the difference between symmetrical and asymmetrical ripple marks.
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What type of sedimentary structure is typically formed by turbidity currents?
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Graded bedding
Mud cracks
Cross-bedding
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