Supplement #1 to Morrison section Bluff N 35° E of Road intersection Dark gray silty sh layers siltstone 12.5± Photoy, lowm. ss pink-ur dark red weather, 18 siltstone + slly siltstu - 6.0 Frizzle siltstu + tmc ss. 15.0+ Fine to med gr l/t gray to white sandstone with chips and blobs hght-gray-white claystone, occasnal rounded chert pebbles in upper 6'. Then about 3' argillaceous ss, weather's out soft with blocky to subcouch fracture, then remainder is less argill., frizzle, whole is massive, x lowm. stones/pegs and inclusions? of chert common in lower 10' white clay blobs througt. Weather's gray with bdf/orange + loc red Fe stain also with knobby Fe couds. Chert looks indigenous to ss, (striktr) slope wash Laterally (to S) along slope the 3' argillaceous ss zone turns into sh silty-gray cloystone + forms bench in mid of the ss. (15.0 above) Section of this feature ss, med+ fine massive lowm w/cq plat/kerys loc. dk gray discout 1.5± Argill siltstu., -red to orange weather. 4.0 L/t gray silty- sandy cl(Stn Fe pet specks througt 1.5-2.0 Hard red stained Fe cement ss as below. ss as in lower 6' above Looks like - 1) Occassional pebbles zrc above crStn zone 2. Chert below it. 44