Folds                                Faults

 


 

-Stage 2.2-

 

Faults

 

There are 3 main types of faults:

 

Normal Faults

 

Reverse Faults

 

Strike-Slip Faults

 


Normal Faults

 

Normal Fault

Main parts of a fault first:

Normal Fault - When the hanging wall moves down and the foot wall moves up

 

Extension - The large arrows on the side show the movement of the blocks. This is when the blocks move away from each other

 

 

 

 


Reverse Faults

 

Reverse Fault

 

Reverse Fault - Pretty much the opposite of a normal fault

 

The hanging wall moves up while the foot wall moves down

 

Compression - The blocks are pushed together

 

Thrust Fault - A reverse fault that is extremely shallow (less than 30°)

 

 

 

 

 

 


Strike-Slip Faults

 

There are 2 types of strike-slip faults depending on the direction of movement

 

Strike-Slip Fault - This is when two blocks slide past one another

The San Andreas Fault is a strike-slip fault

 

Right Lateral

Right Lateral Strike Slip Fault

 

 

 

 

 

Right Lateral - Say you were standing on the X, a right lateral is when the opposite block moves rightwards compared to where you were standing

 

 

 

 

 

 

 

 

Left Lateral

Left Lateral Strike Slip Fault

 

 

 

 

Left Lateral - It is the opposite of a right lateral strike slip fault. When you are standing on the X, the opposite block moves to the left