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.
A fault line is formed by two plates sliding next to each other in opposite directions. This is called a transform boundary.
The force that produces a strike slip fault is a shearing force.
Fault line between the plates
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
they can shake in reverse fault, normal fault, strike-slip fault.
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.
a normal fault
A normal one.
A normal fault would form.
Normal fault, i believe is true.
This is described as a normal fault.
This is described as a normal fault.
This is described as a normal fault.
Normal fault forms tension stress. It is a stress state wherein a body of material is being stretched or expanded.
tensional forces
tensional forces
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.
It moves downward.. the force behind it is tension