Loc. 30-C Loc 196 12"rgo Sphenodiscus A670 D chiefly ss weeths, yell-qn. to butt, loc. clayey. c small concs 6" diam yell-brown rind red-purple vuggy cores barren. change from clayey to sandy in this interval mottled massive clayey ss. brown-stained zone gray sandy cl + cl snd B barren red-brown, gray to db jackets punky sand; 15 cores with yellow calcite on cracks sandy + silty clay greding) to gray silty shale A