What are the 3 fault boundaries?

Most seismic activity occurs at three types of plate boundaries—divergent, convergent, and transform.

What are the 3 types of faults in science?

There are three kinds of faults: strike-slip, normal and thrust (reverse) faults, said Nicholas van der Elst, a seismologist at Columbia University’s Lamont-Doherty Earth Observatory in Palisades, New York.

What is the boundary of a reverse fault?

Reverse or Thrust Faults: The opposite of a normal fault, a reverse fault forms when the rocks on the “uphill” side of an inclined fault plane rise above the rocks on the other side. Reverse faults often form along convergent plate boundaries.

What do Transform boundaries cause?

Transform boundaries are where two of these plates are sliding alongside each other. This causes intense earthquakes, the formation of thin linear valleys, and split river beds. The most famous example of a transform boundary is the San Andreas Fault in California.

What produces a reverse fault?

In a reverse fault, the block above the fault moves up relative to the block below the fault. This fault motion is caused by compressional forces and results in shortening. Other names: thrust fault, reverse-slip fault or compressional fault. Examples: Rocky Mountains, Himalayas.

How do you identify normal and reverse faults?

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 transform boundary?

A transform fault (Wilson, 1965) is a strike-slip fault forming a plate boundary, thus cutting the entire lithosphere that keeps a permanent record of its deformations.

Why are normal faults called normal?

The term, ‘normal fault’ actually comes from coal mining, but more about that later. A fault, which is a rupture in the earth’s crust, is described as a normal fault when one side of the fault moves downward with respect to the other side. The opposite of this, in which one side moves up, is called a reverse fault.

How do normal and reverse faults form?

Reverse faults form when the hanging wall moves up. The forces creating reverse faults are compressional, pushing the sides together. They are common at convergent boundaries. Together, normal and reverse faults are called dip-slip faults, because the movement on them occurs along the dip direction — either down or up, respectively.

What type of plate boundaries do faults occur?

NORMAL: Normal faults occur at divergent plate boundaries. REVERSE: Reverse faults are at convergent plates. STRIKE-SLIP: Strike-slip faults occur at transform plate boundaries. But faults can occur within plates as fractures as well.

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

A reverse fault occurs at an convergent boundary. The 2 plates squeeze together forcing one on top and the other underneath. A strike slip fault is also known as a transform fault. This fault is much like a transform boundary. The plates slip past each other then create forces that build up. Then the plates break apart and an earthquake occurs.

Are reverse faults compressional or compressional?

Reverse Faults. The forces creating reverse faults are compressional, pushing the sides together. They are common at convergent boundaries . Together, normal and reverse faults are called dip-slip faults, because the movement on them occurs along the dip direction — either down or up, respectively.