12.0 Claystone, black, to carbonaceous, with some carb. shale in lower 2 feet. Upper 1 to 1.5 claystone is light gray some yellow streaks Base of massive cliff-forming calitic ss. Thermopolis H3, an offset about 150 feet east of where black claystones of Thermop H2 were measured. Morrison 1.6 - ? Claystone, light greenish gray, silty, yellow powdery film on fractures Cloverly? 4.5 + Interbedded lignitic brown shale, silty brown shale and minor thin plugs silt and lignite 11.0 Conglomerate, 1/2" zv, cht+q+zto with upper 6' solid cal. ledge Below about 4 ft loose contorted x bedded white ss 3.