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Fig. 9. Chalk Cove study site and fault zone. (A) View of fault showing fault zone architecture of a single fault that flares upward into a wide zone of fractures in the densely welded tuff. (B) Fault core composed of 1-mm to 5-cm-thick clay smear or gouge; heterogeneous mixed zones with varying degrees of deformation. Immediate damage zones on either side of fault have fracture intensity values of 11 fractures per meter. Within first 3 m of hanging wall, fracture intensity values increase to 33 fractures per meter. (C) Slip surface is very narrow in the lower part of the exposure.
