133. USGS sections Mt Sauage coal in Negro Mt. stripping. (See map for location of sections) A. Dark gray shale Coal with a few 'knife blade' partings — 29 Carb. shale — 18 Gray soft clay B. Dark gray shale, silty Coal (dirty) — 16 Silty carb. shale — 8 Boney coal — 3 Silty soft clay C. Dark gray argillaceous siltstone Coal — 12 Soft gray clay (Note) 30' east of section C coal locally completely absent. E. Black shale Coal — 16 Carb shale — 1 Coal — 13 Carb shale boney streaks — 10 Gray soft clay. D. Gray to black shale Coal — 18 Carb. Shale — 3 Coal — 8 Carb shale boney streaks — 9 Gray soft clay F. (Both M.S. rider and main bed) Rider * - Sculbygarns. Main bed. Gray to black shale Platey sandstone — 4 Carb shale — 3 Coal — 7 Carb shale — 4 Coal — 7 Gray silty claystone Black shale Coal, knife-blade — 27 partings Carb shale — 6 Gray soft clay.