Index No: NBM055800; Collected By: ; Sample Type: hand sample; Notes: Rock chip sample of silicified gouge of map unit Tdf (of Byers et al., 1976) from footwall of slickensided fault surface. Silica and iron oxide. Fault surface trends N30E, 58SE; fault places Tma to SE against Tdf to NW. -Weiss, 4/6/95.