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Questions and Answers
In a compressional tectonic setting, what is the relationship between the hanging wall and footwall in a reverse fault?
In a compressional tectonic setting, what is the relationship between the hanging wall and footwall in a reverse fault?
- The hanging wall and footwall move horizontally past each other.
- The hanging wall moves upward relative to the footwall. (correct)
- The hanging wall moves downward relative to the footwall.
- The hanging wall remains stationary while the footwall moves upward.
What is the primary factor that leads to seismic activity along a reverse fault?
What is the primary factor that leads to seismic activity along a reverse fault?
- Buildup of compressional stress exceeding rock strength. (correct)
- Tensional forces pulling the crust apart.
- Erosion of the fault plane over time.
- Fluid injection weakening the fault.
A geologist observes a fault where the fault plane is inclined at an angle greater than 45 degrees from the horizontal and the hanging wall shows evidence of upward movement relative to the footwall. What type of fault is most likely being observed?
A geologist observes a fault where the fault plane is inclined at an angle greater than 45 degrees from the horizontal and the hanging wall shows evidence of upward movement relative to the footwall. What type of fault is most likely being observed?
- Reverse Fault. (correct)
- Transform Fault.
- Normal Fault.
- Strike-Slip Fault.
Which tectonic setting is most likely to generate reverse faults?
Which tectonic setting is most likely to generate reverse faults?
How does the angle of the fault plane in a reverse fault compare to the horizontal?
How does the angle of the fault plane in a reverse fault compare to the horizontal?
Flashcards
Reverse Fault
Reverse Fault
A fault where the fault plane is inclined at an angle greater than 45 degrees from the horizontal.
Reverse Fault Slip
Reverse Fault Slip
Vertical motion where the hanging wall moves upward relative to the footwall.
Reverse Fault Setting
Reverse Fault Setting
Convergent plate regions or areas with compressional tectonic stresses.
Reverse Fault Earthquakes
Reverse Fault Earthquakes
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Thrust Fault
Thrust Fault
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Study Notes
- Type of fault: Reverse Faults (Thrust Faults)
- Fault Plane Angle: Inclined at an angle greater than 45 degrees from the horizontal.
- Direction of Slip: Vertical motion; the hanging wall moves upward relative to the footwall.
- Reverse faults typically form in compressional tectonic settings, such as convergent plate boundaries.
- Reverse faults form in areas undergoing compressional tectonic stress, where the Earth's crust is being pushed together.
- As the hanging wall moves upward relative to the footwall, compressional stress builds up along the fault plane.
- When the accumulated stress exceeds the strength of the rocks, they break along the fault, releasing stored energy as seismic waves.
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Description
Reverse faults occur at an angle greater than 45 degrees. They cause vertical motion where the hanging wall moves upward relative to the footwall. These faults typically form in compressional tectonic settings, such as convergent plate boundaries.
