Fig. S1. Field documentation and genesis of the back-structures from the Garhwal Lesser Himalaya, Uttarakhand, India

(a) Near the Raturi Sera Bridge on the Uttarkashi–Gangotri Road (National Highway 108). Top-to-10°-up shear at Location 6 (30.7432°N, 78.3586°E). Width of photo c. 4 m. A back-structure zone in Berinag Formation quartzites at Location 6 (30.7432°N, 78.3586°E). (b) Top-to-10° compressional brittle shear. (c–d) Top-to-10° compressional brittle shear as seen on the eastern bank of river Bhagirathi. Width of photo c. 2 m.