FIGURE 7.21 Block diagram of an eroded reverse fault 2. The block on the left represents a pre-movement block diagram of a reverse fault. Fill in the block on the right with how it should look after some movement along the fault. This is subject to some interpretation, so not everyone's blocks will look exactly the same. Before faulting After (right-lateral) faulting FIGURE 7.23 Block diagram of an eroded right-lateral fault 3. The block on the left represents a pre-movement block diagram of a right-lateral strike-slip fault. Fill in the block on the right with how it should look after some movement along the fault. This is subject to some interpretation, so not everyone's blocks will look exactly the same.