A gouge zone several meters in width is exposed in the stream bed about 100 meters upstream of the picnic area. "Fault gouge" is a geologic term for the crushed and ground-up rock produced by friction between the two sides when a fault moves. This is probably the same fault zone that is exposed in the creek below the gazebo (see other tour) but the faulting is more localized here. The gouge is spectacularly foliated, steeply dipping and strikes NE. Such a wide zone of gouge with a well-developed fabric suggests that there may have been significant motion on this fault. Unfortunately, I have found no markers that would tell me how much motion.

By the way, these faults have been inactive for at least the last 100 million years, so the earthquake hazard is negligible.

See a close-up of the gouge zone.