Loc. 270 Northwest-facing bluff south of Grzud River in the SW corner, sec. 21, T. 20 N., R. 23 E., Black Horse NE quadrenglo, Corson Co, So. Daks. Exposure of Irish Creek lithofacies capped by Timber Lake member. Could get a section but would take considerable digging. Guess at parts = 100 - ss with fzheredin only, slumped ? 75 - grzy suda shale joly sandst approx in from bdy 25 - Jezusite chiefly barren ls same with singly zannicrate (nicollet) [colt] A-4653 O - Kerry's wood+shell conc. A-4654 isolated sphenos in floz A-4655 O - baszl bun. with cones with bloking fracture A-4656 Note that the P.linguiforms founz high in Irish Creek is lacking here, or else we didnt find it. 12