Fig. 3. Outcrop photographs of undeformed Bishop Tuff. (A) Entire sequence from near Chalk Cove site. Lower white sequence is the nonwelded airfall deposits, overlain by Units B–D. (B) Close-up photographs of the basal thin-bedded airfall deposits. (C) Massive nonwelded sequence. (D) Upper portion of Ig2Ea and Ig2eb of Wilson and Hildreth (1997). Note variation in fracture density upsection, which corresponds to variations in welding.