#21 #40 F.H. S. bank W facing cut of Moreau River., sec 12, T 14N, R 17E, Ziebach Co. S.D. Section measured + Samples taken. Measured from river level. Lower 27.5 ft. not exposed. Measurement includes middle F.H. shale member + upper 55. Lower F.H. Middle F.H. shale member. 5" Bentonitic sand, yellow brown 1) 5' Shale, dark gray, sandy, weathering light grey brown, with small interbedded sands 22'6" Sand, massively bedded, grey brown weathering light brown, with yellow streaks, few-grey shale partings, some layers of small nut-size yellow brown concretions.