Eau Claire, Eau Claire, WI 54702. Therefore, it is likely that this jog bounds two distinct segments of the fault system. The cliffs trend NE, roughly perpendicular to the bounding faults. Both sets show evidence for recurrent activity as breccias with mineralized clasts. Farther west, outside the segment boundary, the cliffs display abundant vertical and sheeting joints.
Hydrothermal alteration occurs along fractures and faults.
Dominant minerals include chlorite and laumontite but epidote and calcite are also abundant. Fine-grained silica occurs within fault zones. Ongoing hydrothermal activity is evident at the adjacent Hortense and Mt. Princeton Hot Springs.