Fault gouge from the Amargosa fault, Death Valley, California.
A. Exposure on west side of Virgin Spring Wash.
B. Exposure about 2km west of Virgin Spg. Cyn.
C. From same exposure as photo B. Red arrows mark minor faults within variably brecciated hangingwall; orange arrow marks foliated gouge above principal sliding surface.
D. Exposure about 3km west of Virgin Spg. Canyon. Note the striations and irregular fault surface.