LOCALITY 81 Section #1, Measuring up from lower bentonite with associated jarosite, river bluff face in (1) 18.7 Silty clay and clayey silt, dark gray with irregular layers and blobs of silt - mixed aspect. Has some blobs jarosite. Weathers light gray. Has 1.0 yellowish green-gray bentonite at base with cone-in-cone and gypsum. Some of the silt pockets include v.f.q. sand grains. At top zone is cones, grains weather light brown, some yell. calcite. Mixed silty clay and clayey silt with silt predominating; some lummzo vfg sand; gray to dk.gray weaths gray to light gray. Some local Ob & jarosite stuv in sandy layers. At top is sparse scattering limestone cones up to 1ft, weath. light creamy gray, mg stain on creek surfaces. (2) 24.0 (3) 8.8 Clayey silt as above, with 0.7 blue gray bentonite at top. Sctt. cone-in-cone cones & local assoc. ls cones. Bentonite shot with small interconnecting borings in upper 2". (4) 5.0 Clayey dk gray silt as above with local ls.conc, ledges about 0.5 thick about 3.5-4 above base. Weath. light yellow-gray (5) 13.5 Silt, somewhat clayey, with more intermixed sand than in units below; mottled grayish brown brown gray with local Fe stain, weaths 33