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32 J. Profile of main barranca ca. 1 km. E. of A. 10�-15� Soft channel beds. #120, 125 8� Hard nodular bed 10� Greyish yellow tuff. 18� x-bedded gravel + sand. Basal pebbles include vesicular lava. #119 Unconformity 78' Massive white tuff. #123 (not in place) Contact obscure 25' impure tuff + clay, buff, pink, or yellowish. Concordant =X of Profile I. 12'Massive tuff, weathering pink. Contact not clear, Silicified patches. Tuff pebbles below. possibly unconform. 27'� Impure tuff, gray below, more #116, 117 yellow above, + weathering pink near top. Intergrad- { 14'� Yellow tuffaceous clay. ing. #78{ #77{ 14'� Impure buff to gray tuff . }= Y of Prof. I. #79{ 14'� White tuff Sharp contact 10�+ Fine yellow clay. R28. Local bottom. COLI-HUAPI 33 112. _ palate with teeth. Hor. of #101. C.S.W. 11/4/30. 29467 113. Small ungulate jaw. Gray clay 30� above manganese band [apparently nr. Top of horizon Y of profile I, p. 28-G.G.S.]. C.S.W. 11/4/30 28670 114. _ ungulate palate. Hor. of #79. C.S.W. 11/7/30. 28583 115. 2 jaw frags. + several dissoc. teeth. Same hor. + loc. as #114. C.S.W. 11/7/30. 28833. 116. Small upper jaw frag., 2 teeth. 1� above bottom hard pink bed, profile p. 32. C.S.W. 11/8/30. Astrapan. Beds 29402 117. 2 notoungulate jaw frags. Same as #116. C.S.W. 11/8/30. 29452-3 118. 2 dissoc. teeth, surface 6' below #117, almost surely from same horizon. C.S.W. 11/8/30. 29457 119. Parastapothere lower molar. Profile p. 32. C.S.W. 11/8/30. 120. Ungulate jaw. Profile p. 32. C.S.W. 11/8/30. 29688