Thornton ? 606-4 to 608. 606-4 to 606-10 Silty, caky claystone minor small light frogs. 606-10 to 607-4 Silty to sandy claystone lighter, larger, light frog sandy silt. 607-4 to 608 Clay-some hard fragments (Spec G 111) Bolivan 7/11-3 - 7/13-2 - (Total Samples) 7/11-3/ 7/11-7 Gray silty claystone. 7/11-7 7/11-11 Silty, muggy claystone grading to sumpfluit at base. 7/11-11 7/12-5 Brown silicious (silty under 5x) sumpfluit + claystone? GC 112 7/12-5 7/13-2 Frequental silicious claystone brown frogs, blue gray chalkstains interstitial material, Fe stringers throughout: GC 113