Locality 88. Exposures on NW facing bluff and spurs below it in the E1/2, NE1/4, sec. 27, T. 14 N., R. 23 E, Lztrvy NE quad, Dewey Co., So. Dzk. Sections on spurs, including one extending NEward into NW corner sec. 26. Elk Butte shale to the small Idoneczycz layer in Timberlake member Section 1. Beginning in gulley side where there are no markers and apparent transition from Elk Butte to Trail City Base slope 1) 6.3 Intermixed dk finely silty shale and cloyey silt. Shale like that in Elk Butte but silt pods like T.C. Shale locally, most common fracture fresh is blocky; weathered - shale predominates 2) 0.3 Gray silt layer, loc. shaly silt, slightly cloyey 3) 9.0 Blocky cloyey silt, gray, and darker gray as clay increases, some silty shale but this chiefly in lower part. At top. scattered gray to red bru mott. silty pinky calc canggs - loc. with calcin cone outer layer. May not be a continuous layer. Cores are X 12m silt + appear local conc. In a carily continuous silt layer, trench shows silty layers irreg, slit with clayey. at top butchfally mixture 4) 5.7 Cloyey silt-gray + dkrsilty clay, blocky irreg mixture. Silty band 0.3+ at top locally Fe stained and some calc concentration bodies with OB & RB staining. Small rounded gray is conc 14