Figure 2—Comparison of outcrop scintillometer readings (raw counts) and pseudo gamma-ray curve hand-drafted to major lithologies; Kleine Rietfontein, Fan 2, lower, (modified from Rozman, 1998). Shale >70, siltstone >40–70, bedded sandstone >10–40, massive sandstone = 10 counts on gamma ray. Depth is reported in meters.