W-21 Fall River Valley, 5 mi. S. Hot Springs S.D. Evan's quarry on W wall where river cuts into thick massive SS. If quarry face is in type then Fall River is not what we are taking it as. This should be cleared up. Skull Creek-(in part) (22) 3.0-? Shale, black to oth gray selenitic, some Fe soucs 1.5 from base (21) 2.5 Shale, black clay, some very fine 1em silt with gyp, possibly thin bentonite locally?, in upper 1" lowe 1.0 is thin parcalzinite scztt gyps Fe spongy cones at top silt zone (20) 7.8 Shale, oth gray to black fissile 2f top and base with more greyish weth. siltier zone 1.0-2.0 wide 2.15 to 3.0 from top. Sample A - vertebrazs, from this siltier zone (6436) VP only (19) 4.7 Shale Oth gray to black fissile 57