View to the northwest of the Punchbowl fault, southern California. This fault has about 44 km of right-lateral displacement, and here juxtaposes Proterozoic gneisses on the left against Tertiary Punchbowl Formation. The fault zone is extremely narrow, and out work attempts to characterize and explain the processes in the fault zone. See Chester et al. , 1993, and Evans and Chester, 1995, for details.