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40 PROFILE M � End of most eastern promentory, before reaching lava capped + much falted block. COLI-HUAPI. Top of Barranca 40'+, impure pinkish tuffs. Gradation R32 45'- very irregularly Remarks bedded pink tuff, with many yellow beds and partings. Limonite #147 + manganese concretions. Cg. Of tuff pebbles often in lower strong part. unconformity 200'�, mostly Remarks massive tuff, very faintly bed- ded, mostly pinkish. Impure (Part omitted) and with more or less mang- anese, esp. in Remarks lower part. {#247 #242 etc. 11'impure tuff and fine yellow 1'-3' white tuff clay #241 25ձ fine yellow + greenish clay, some tuff. Bed 'Y' of 13' impue, irregular yellowish tuff. Coli-Huapi 6' gray to pink tuff, partly in- profiles #145 durated and concretionary. 16' impure yellowish tuff. 30' massive white tuff. Sharp Fine yellow clay. COLI-HUAPI 41 147. Palate frag, 6 teeth. Profile 40. 2� above #146, but above unconformity. C.S.W. 11/20/30. 29474 149. 2 jaw frags. 60' under 'Y', profile p. 46. C.S.W. 11/20/30. 2.-KM 170 150. Notostylopid (?) jaw frag. Probably about level of #260 but not certain. J.H. 11/23/30. 28586 151. Frags. As #259. C.S.W. 11/23/30. 'CERRO BLANCO' 152. Polydolopid jaw with M3-4, 28836 palate frag. (not polyd.) with 2 teeth, + other frags. As #262. C.S.W. 11/28/30. 28435 28482 CERRO DEL HUMO 153. Back part of ungulate skull. �Lower quarry�, see profile p. 85. C.S.W. 12/12/30. 29414 154. Notoungulate jaw. Same level as #153, different quarry. CS.W. 12/9/30. 29475 155. Notoungulate jaw. As #153. C.S.W. 12/12/30 29480