Fig. 20
Outcrop photograph and structural orientation data from Kukutsu Cliffs (Fig. 1 for location). A Photograph showing euhedral adularia crystals approximately 0.5 cm in width growing along the wall of a late-stage extensional vein. B and C show orientation data for late-stage veins and youngest penetrative foliation, respectively. D Orientation data for S4 and an associated extensional shear zone that indicate a top-to-the-east-southeast sense of shear. Based on correlations with fabrics observed in the western Chingsuei River, the late fabrics are interpreted to be D4 structures. The Kukutsu Cliffs outcrops are located on the RYUK block (Fig. 1), which is rotating clockwise with respect to the central Backbone Range (Rau et al. 2008). See text for discussion