Lesson Flashcards: Faults and Joints

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Definition

Graben

A rock mass that is the hanging wall between two normal faults

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Definition

Fault

A fracture in a rock along which there has been an observable amount of displacement

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Definition

Footwall

The rock mass that lies below the fault plane

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Definition

Normal fault

A fault resulting from tensional forces, where the hanging wall has moved downward relative to the footwall along the fault plane

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Definition

Stress

Force applied per unit area

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Definition

Fault dip

The inclined angle between the fault plane and the horizontal parallel plane at the surface

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Definition

Hanging wall

The rock mass that lies above the fault plane

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Definition

Reverse fault

A fault resulting from compressional forces, where the hanging wall has moved upward relative to the footwall along the fault plane

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Definition

Horst

A rock mass that is the footwall between two normal faults

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Definition

Tensional stress

The stress that tends to pull something apart

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