Degradation; Denudation; Erosion; Erosional Features; Fault Scarps; Fault Traces; Faulting; Faults; Geomorphology; Ponds; Sag; Surface Processes; Surface Water; Topography; Water Resources | Sag ponds forming along the Denali Fault. Prominent scarps with sag ponds are also found along the fault trace, such as this one in the vicinity of Foggy Pass on the South Slope of the Alaska Range. The ground is weakened on the fault trace and has the tendancy to sag and erode more easily than surrounding land. Photo by P. Brease. | 
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