In a reverse fault, the fault part that lies below the other part is called the _____.
The block below a fault plane is the footwall; the block above is the hanging wall.
To find the answer to this question, we can start by understanding what a reverse fault is. A reverse fault is a type of fault in Earth's crust where the hanging wall (the block of rock above the fault) moves upward relative to the footwall (the block of rock below the fault).
In the case of a reverse fault, the fault part that lies below the other part is called the footwall. The footwall is generally considered to be the lower part of the fault surface, and it is the rock block that is below the fault plane and is displaced upwards.
Therefore, in a reverse fault, the fault part that lies below the other part is called the footwall.