Hole #4CB El. 2660 0 to 10-9 Surficial material 12-9 Weathered (buff) medium grained sandstone 16-5 Poor recovery - gray to black silty shale and some fragments of bone 17-11 Coal (no recovery) 23 Gray silty clay 36 Light gray micaceous siltstone, thin layers of sandstone 38 Gray clay shale, micaceous 38-9 Black shale 46-9 Gray argillaceous limestone + limey claystone 51-9 Medium to fine grained sandstone 71 Medium to coarse grained sandstone 79 Siltstone with interbedded sandstone 85-4 Gray argillaceous limestone 86-4 Black finely silty bastard clay 90-11 Dense gray argillaceous limestone mottled buff 113 Greenish gray clay with irregular lenses of buff-colored limestone 120-9 Gray silty clay few limestone layers (115 to 115-3 and 116-10 to 117-10) 121-3 Coal, bone partings 123-9 Fine sandstone, irregularly bedded, some siltstone streaks. 125-9 Gray to black shale, plant remains 138-6 Dark gray to black silty claystone grading downward to siltstone 142-10 Coarse-grained gray sandstone 153-10 Limey claystone + argillaceous limestone, limestone pellets throughout. 155-10 Dark gray silty clay 159-2 Dense gray limestone 167 Gray, locally silty, claystone with sandy streaks. Considerable Fe as stringers and siderite concretions. 17.