5 2' Sandstone, gray thinly laminated, cross-bedded; some streaks of dark shale at base 4" Sand), greenish gray, extremely fine dirty 1' Sandstone, gray, fine, thinly laminated cross-bedded. 5/4' Sand, greenish gray, extremely fine, very soft, dirty, thinly laminated 1' Shale, medium gray, blocky, hard, (4) very sandy. 4" SS. gray, extremely fine, hard, argillaceous. 3" yellow sulphur, limonite zone Pierre - (Elk Butte member?) 7/9" Shale, medium gray, blocky, hard: (3) some thin sulphur streaks; trace small brine nodules.