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Normal faults cause an "extension" in the Earths Crust. However this extension IS NOT caused by "tension".
Rocks in the ground are subject to compressive forces at all times, if this were not the case the Earth would fly apart.
However the direction and relative magnitude of the greatest compressive force can change with time as a result of the movement of the Earths tectonic plates (driven by the heat energy emanating from the Earth's core).
If there were no plate tectonics, the direction of greatest force would always point downwards and would be caused by "gravity".
Hoverer, when plate tectonics drives plates together, the greatest force can become horizontal and increase to the point where it exceeds the strength of the rock and the rock will fracture along a REVERSE fault which shortens and thickens the crust.
Likewise, when plates are moving apart, horizontal compression can decrease (relative to the other compressive forces acting on the rock) to the point where gravity exceeds the strength of the rock and the rock will fracture along a NORMAL fault which extends and thins the crust.
What else can I help you with?
Which type of force produces strike-slip fault?
The force that produces a strike slip fault is a shearing force.
Where can a normal fault occur?
Fault line between the plates
Difference between normal fault and reverse fault?
The movement of the Hanging wall in the normal fault downward with the gravity whereas in the Reverse fault the hanging wall moved upward against the gravity
What ways earthquakes shake?
they can shake in reverse fault, normal fault, strike-slip fault.
What kind of faults do you have?
There are three kinds of faults. First there is the Strike-Slip fault. Second there is the Normal Fault and third of all there is the Reverse Fault.
What fault forms when plates are pulled apart?
a normal fault
What kind of force does a normal fault have?
A normal one.
What kind of fault forms when rock is pulled apart?
A normal fault would form.
By what type of fault were the sierra mountains formed?
Normal fault, i believe is true.
When the rock of the fault surface Moves down relative to the rock below the fault surface what kind of fault forms?
This is described as a normal fault.
When the rock above the fault surface moves down relative to the rock below fault surface what kind of fault forms?
This is described as a normal fault.
When the rock above the fault surface moves down relative to the rock below the surface what kind of fault forms?
This is described as a normal fault.
What type of force caused normal fault to form?
tensional forces
What kind of stress does normal fault form?
Normal fault forms tension stress. It is a stress state wherein a body of material is being stretched or expanded.
What is another name of a normal fault?
In a normal fault, the fault is at an angle, so one block of rock lies above the fault while the other lies below it. The rock above it is the hanging wall and the rock below it is the footwall. In a normal fault, the hanging wall moves downwards relative to the footwall.
Rock above a fault that moves downward?
It moves downward.. the force behind it is tension
What kind of rock forms when rock is pulled apart?
A normal fault would form.
