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10 C. Profile of lower beds, Coli-Huapi, about 1 Km. E. of Profile A. 25'+ Pinkish beds, highly gyps', with seams + lenses of impure gyp. Highest fissile silicified} bed 15' soft gypsiforous clay 115' Horizontally banded but broadly lenticular clays, + highly silicified fissile tuffs. Especially the latter brillantly colored or more often irregularly mottled red, yellow, orange. Often with Part Omitted limonite nodules. 12' Transitional beds. soft clay with yellow patches and lenses of silicified tuff. 15' + (bottom not exposed here) < soft sandy shale, dark red, brown or slate colored. <= observed bones, unidentifiable. COLI-HUAPI 11 24. Rodent lower jaw and isolated tooth. 3� above hor. Of #15. G.G.S. 10/18/30. 1 package. 29705 25. Four isolated teeth, found above channel beds but not in place. Party. 10/21/30. One package. 26. Colpodon. Lower jaw with 4 teeth. Ca-adon A. About 3' below #7 (profile p. 3). J.H. + G.G.S. 10/21/30. One block. 29687 27. Astrapotherium. Upper jaw with (crossed out: 3 molars 4 teeth) 3 molars. 9' above horizon of #8, profile, p. 2-3. J.H. + G.G.S. 10/21/30. One block. 29720 28. Notoungulate skull, medium size. Cheek teeth not visible. Near #27 + same horizon. J.H. + G.G.S. 10/21/30. 1 block + 1 package. 29685. 29725 29. Three dissociated lots: fragments of rodent skull; astragalus, ungulate tooth. Same data as #15. Party. 10/21/30. 1 package. 29706 30. Three isolated teeth. Frag. of notoun-gulate jaw with two teeth. Upper (Colpodon) beds, exact level not fixed. J.H. 10/24/30. 1 package. 29707 31A: 3 ass'd ungulate molars.} Colpodon beds, 31B: 9 dissociated teeth, etc. not in place. G.G.S. 10/24/30. 2 packages.