5 165 lt brownish gray weathering, massive siltstone, ledge forming, fines upward, transitional to unit 6 6 130 dark gray plastic mudstone, lt, brownish gray weathering. 7 140. Lignite, impure w. clay 8 495 Interbeds of lt, gray siltstone w. carbonaceous blebs and thin spalls of lignite. Some clay Fe concs., [illegible] wood. Rare ledges of limonite cemented silt. Weathers lt, gray w. trace of fluting. 100' north large channel of lt, gray fluted rock occurs at this level. 9 25 25cm b. gray clay massive. 10 340 Lignite, forming prominent