Figure 26. Hypothetical model of fault-block derived accommodation variability. A) In an area with pre-existing faulting, reactivation is likely during periods of high stress such as compression during an orogenic phase (orange arrows). B) To relieve the stress, the faults may move, but not necessarily uniformly, but at different rates creating highs and lows between faults blocks. Rotational motion will also create higher and lower regions. C) The overall effect on deposition will be to generate lows that accumulate sediment, and highs that will erode, deflect currents and create multiple trending sediment packets. If the fault activity occurs during deposition, then the changes may be observed within the sedimentary deposits. It is important to note that neither scale nor orientation is implied by this model, such this model could represent basins or outcrop jointing.