Morrison Section N side Bear Cr. Gap. on slope about highway Surficial material 23.3 Sandstone, massive cross-bedded & cross laminated, fine grained. Many intersecting channels. Gray, weathering buff to iron brown discont - (channel base) 3.3 Silty dk gray shale and siltstone, beds of laminated siltstone (latty carb) up to .5 in upper foot 1/2. Middle foot mostly dk gray silty shale, lower shly silty 1.6 Fine grnd ss with silty lzmnrz. Weathers with greenish cast, very hard. (Thickens along strike of adjacent channels) 1.7 Hard dk gray to black argillaceous siltstone concoidal fract. 2.8 Sandstone, fine grained, argilaceous in upper 1.5 to 2 ft. Argill. part weathers rounded lit grey blocks conch to semiconch, grades down to harder compact ss which weathers buff, + zugular. discont - (appears persistent but not much diff from similar ones in big ss below. 115.0 Sandstone, thick bedded to massive, all cross laminated, hard, fine+loc. med-grained! Many intersecting channels, ripple marked bedding surfaces. Color, lit grey, weathers buff iron brown, dk wash streaks + lithous. Some cause to cgl lenses in lower 2 ft. Cgl consists of shale frags with 11.7 (Interbedded), siltstone & fine sandstone, mirror silty shale. Upper 3.6 is silty dk shale, loc. carbonaceous with interbeds fine sandstone up to .6. This grades into massive zone of irregularly interbedded siltstone and fine ss, both laminated with some silty shale, shows interstratal deformation. Whole is dark to light + greenish grey, weathers lighter green. 1.3 to 2.8 Argillaceous siltstone + silty claystone 18