West Middle Fork Powder River #2 About 200 ft. S. of #1 Measuring up from top sandstone unit 4 of preceding section 8,5 Claystone, silty to sandy, light gray, grading to clayey hard very fine ground ss to siltstone at base 1.5 to 2.0. At top becomes sandy with local lenses fine SS up to 1.0 which includes large polished pebbles. Whoa SS absent pol, pb. float from clstn Zt contact - seems to be concentration of same Zt this contact. The base 1.5 to 2.0 feet of sandy stnt clay SS here can be walked out into unit 3 of preceding section Top of this 8.5 unit loc siltstn in upper 0.2 with spherulite. 5,5+ Shale, black, fissile, with thin intebeds olive gray siltsf + also laminacc, "worm" marked. Above becomes down. Olive wash of plan" 'Wormy' silt. 66