What is the meaning of dip-slip fault?
Dip-slip faults are inclined fractures where the blocks have mostly shifted vertically. If the rock mass above an inclined fault moves down, the fault is termed normal, whereas if the rock above the fault moves up, the fault is termed reverse.
What causes dip-slip faults?
Normal dip-slip faults are produced by vertical compression as Earth’s crust lengthens. The hanging wall slides down relative to the footwall. Reverse dip-slip faults result from horizontal compressional forces caused by a shortening, or contraction, of Earth’s crust. The hanging wall moves up and over the footwall.
What are two types of dip-slip fault?
A detachment is a shallow dipping normal fault, a thrust is a shallow dipping reverse fault. The concept of Hanging and footwall block does not apply to vertical faults. In strike slip faults the motion of a pair of block relatively to each others occurs in a direction parallel to the strike line of the fault plane.
What are the 3 types of dip-slip faults?
Fault Types
- Normal fault. A dip-slip fault in which the block above the fault has moved downward relative to the block below.
- Reverse fault. A dip-slip fault in which the upper block, above the fault plane, moves up and over the lower block.
- Strike-slip fault. A fault on which the two blocks slide past one another.
Where are dip-slip faults?
normal fault – a dip-slip fault in which the block above the fault has moved downward relative to the block below. This type of faulting occurs in response to extension and is often observed in the Western United States Basin and Range Province and along oceanic ridge systems.
What happens in a strike-slip fault?
Strike-slip faults are vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally. The fault motion of a strike-slip fault is caused by shearing forces. If the block on the far side of the fault moves to the left, as shown in this animation, the fault is called left-lateral.
What is an example of a strike-slip fault?
Transform faults within continental plates include some of the best-known examples of strike-slip structures, such as the San Andreas Fault, the Dead Sea Transform, the North Anatolian Fault and the Alpine Fault.
What is a good example of a strike-slip fault?
Do strike-slip faults cause earthquakes?
Earthquakes occur on faults – strike-slip earthquakes occur on strike-slip faults, normal earthquakes occur on normal faults, and thrust earthquakes occur on thrust or reverse faults. When an earthquake occurs on one of these faults, the rock on one side of the fault slips with respect to the other.
Why is it called strike-slip?
strike-slip fault, also called transcurrent fault, wrench fault, or lateral fault, in geology, a fracture in the rocks of Earth’s crust in which the rock masses slip past one another parallel to the strike, the intersection of a rock surface with the surface or another horizontal plane.
What type of stress produces a strike slip fault?
Shear Stress. Shear stress occurs at boundaries where two plates are sliding sideways past one another, like cars traveling in opposing lanes on a highway. Friction between the plates grinding past one another produces the stress. Shear stress is associated with transform faults, which may also be called strike-slip or slip-strike faults.
What are the types of strike slip faults?
Transform faults within continental plates include some of the best known examples of strike-slip structures, such as the San Andreas Fault, the Dead Sea Transform, the North Anatolian Fault and the Alpine Fault.
What is a slip and Slide Fault?
The San Andreas faults is called a slip-slide fault, where the Pacific plate on the Western side is moving Northward, and the American plate on the Eastern side is sliding Southward. The leading part of the plate used to be a subduction fault that built up the Sierra Nevada.
What is an oblique slip fault?
oblique slip fault. A fault which has slippage along both the strike and dip of the fault plane.