The two sides of a non-vertical fault are known as the hanging wall and footwall.
From the en.wikipedia.org
In reverse, or thrust, faults, relative subsidence may be measured in the footwall.
From the en.wikipedia.org
Iron-rich solutions precipitated the iron on to a syeniteporphyry footwall.
From the en.wikipedia.org
By definition, the hanging wall occurs above the fault plane and the footwall occurs below the fault.
From the en.wikipedia.org
The hanging wall moves downward, relative to the footwall.
From the en.wikipedia.org
A reverse fault is the opposite of a normal fault-the hanging wall moves up relative to the footwall.
From the en.wikipedia.org
By definition, the hanging wall occurs above the fault plane and the footwall all occurs below the fault.
From the en.wikipedia.org
The hanging wall moves upward, relative to the footwall.
From the en.wikipedia.org
Graben are produced from parallel normal faults, where the hanging wall is downthrown and the footwall is upthrown.
From the en.wikipedia.org
More examples
The lower wall of an inclined fault
In geology, a fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement. Large faults within the Earth's crust result from the action of tectonic forces. ...
The underlying side of a fault. If you walked on the fault plane, your foot would be on this wall. See also 'hanging wall'.
The mass of rock beneath a fault.
The underlying side of a fault, orebody or stope.
The part of the country rock that lies below the deposit.
The rock on the underside of a vein or ore structure.
The rock immediately underlying a mineral deposit.