We can get a feel for the large scale deposition of this massive chert layer. The falls are created by the same method for the mass-wasting at the previous stop. The chert is resistant to erosion and the more easily eroded basal layer undercuts it. This leaves a cliff face that the water falls over. Also numerous potholes and other fluvial erosion structures are present in this area.
Shoal creek shows fastest flow downstream from the falls on the north side of the creek.