Partial section base Skull Cr or top Fell River, Devils Tower i SE Quad Locality W-1 - stream cuts W. of gate (3rd) on rd to Gout Canyon, 1 mile north turnoff from County Rd to Alzocle, cent. W 1/2 SW 1/4, sec 7, T.56 N, R.84 W Measuring up from a rusty stained siltstone under bentonite. 0.8 Siltstone, clayey, lenticular, irreg. bedded, wezths rusty brn, grades laterally (a rests on) to black shale locally. 1.8 Bentonite, yellow gray in b>52 10.3, green in upper 0.6 rem<under variable, Fe brown to olive br. 2.0 Shale, blocky to subconch on fresh surf, black, mottled with grey, slicked, finely silty. Upper 1/5+ has lenses + in turbeds white silt. wezths YB, Upper 0.5+ loc. Fe impreg, conc. silt with shaly break and bedding surfaces with shot-sized CaCO3 rosettes 1