How do you know if its a normal or reverse fault?

In a Normal Fault, the hanging wall moves downwards relative to the foot wall. They are caused by extensional tectonics. This kind of faulting will cause the faulted section of rock to lengthen. In a Reverse Fault, the hanging wall moves upwards relative to the foot wall.

What type of fault is the Owens Valley?

frontal faults
Owens Valley is bounded on west by frontal faults at base of Sierra Nevada and on east by frontal faults at base of lnyo and White Mountains.

What is the difference between a normal fault a reverse fault and a strike-slip fault?

In normal and reverse faulting, rock masses slip vertically past each other. In strike-slip faulting, the rocks slip past each other horizontally.

Is thrust and reverse fault the same?

Thrust faults are reverse faults that dip less than 45°. Thrust faults with a very low angle of dip and a very large total displacement are called overthrusts or detachments; these are often found in intensely deformed mountain belts.

What force causes a reverse fault?

compressional forces
Reverse fault—the block above the inclined fault moves up relative to the block below the fault. This fault motion is caused by compressional forces and results in shortening. A reverse fault is called a thrust fault if the dip of the fault plane is small.

Why did Owens Lake dry up?

Steamboats hauled ore across the lake from mines in the Inyo Range (fig. 1). Water was first diverted from the Owens River to the City of Los Angeles in 1913, and by 1926 Owens Lake was dry. The dry bed of Owens Lake has produced enormous amounts of windblown dust since the desiccation of the lake (fig.

What type of fault is the Klamath Mountains?

thrust fault
A thrust fault is a reverse fault with a gently-dipping fault surface. Thrust faults are very common in the Klamath Mountains of northern California.

What is the stress in a reverse fault?

Compressional stress, meaning rocks pushing into each other, creates a reverse fault. In this type of fault, the hanging wall and footwall are pushed together, and the hanging wall moves upward along the fault relative to the footwall. This is literally the ‘reverse’ of a normal fault.

What are the effects of reverse fault?

(A) Reverse faults display severe damage in the form of landslides over the fault trace caused by the inability of the hanging wall to support the overhang caused by the fault displacement, folds, and compression features within the fractured hanging wall, and compressional block tilting.

What stress causes a reverse fault?

Reverse faults are produced by compressional stresses in which the maximum principal stress is horizontal and the minimum stress is vertical.

How is the fault system in Death Valley?

Death Valley’s current fault system is a bit more complicated. A network of two strike-slip fault zones is linked together by a normal fault zone. The normal fault zone is being pulled apart by the lateral (side to side) motion of the two strike-slip faults (see figure).

What was the largest earthquake on the Owens Valley Fault?

The largest earthquake in its vicinity was the 1872 Lone Pine earthquake, which was on the adjacent Owens Valley Fault and had an estimated moment magnitude of 7.4–7.9. Around 200 million years ago, the ancient oceanic Farallon Plate began to subduct beneath the North American Plate.

How often does the Sierra Nevada Fault occur?

Tectonic activity. Uplift on this fault is about 0.01–0.03 mm per year. This movement, combined with the activity of the adjacent Owens Valley and Lone Pine faults, is responsible for the continuing rise of the Sierra Nevada Mountains. No large earthquake has been reported on this fault in recorded history.

What makes a normal fault a reverse fault?

Images of Normal and Reverse Faults Normal Faults Normal faults are produced by extensional stresses, which causes the headwall of the fault to sink against the footwall.