'; ?>
click to enlarge
42 Remarks- Profile M. 1. This thick, irregular channel series rapidly grades laterally into more normal pinkish tuffs like those above and below. The plane of un- conformity becomes less undulant but remains visible, and the channel series reappears farther east. It is at a higher level than the large channel series of profile A, but may be contemporaneous. The beds cannot be traced, as they are eroded between the two localities. 2. A varying thickness of the upper part of the pink tuffs is slightly indurated below the unconformity + tends to stand in vertical cliffs. 3. The lower 15ձ of the pink tuffs immediately west of here is somewhat indurated. It contains much manganese + calcite, barite, + chalcedony concretions. A zone 10� � 15� above the base contains innumerable bones, but extremely fragmentary except a few in concretionary manganese (#242 etc.). Immediately east of here this level passes into an irregular channel series up to 25'� thick + unconformable at the base. It appears to be contemporaneous with Bed X of Profile I or the 'Lower Channel' of profile A. The bed marked Y has been traced continuously through all the profiles and is the most certain and easily recognizable in the barranca, although the tuff is here thinner + less pure or white than at most localities farther west. 28964-7 28969-87, 28989. -CERRO DEL HUMO- 43 156. Frags. Not assoc. About Lower Quarry level. J.H. 12/13/30. 1pack. 157. Isolated teeth, etc. As #153. C.S.W. 12/13/30. 3 packages. 29431-4, 29476-8 29479 29484-5 158. 1 upper molar; 2 assoc. broken lower teeth; several isol. bones. As #284, p. 89, + profile, p.85. G.G.S. + J.H. 12/13/30. 1 pack. 159. Upper jaw, 3 teeth, Various armadillo scutes. Large canine. At or near quarry levels. G.G.S. + J.H. 12/10/30. 1 pack. 29458-60 29461 160. Small jaw. An isolated locality, approximately level of #153. J.H. 12/12/30. 1 block. 29412 161. Large jaw, both sides. Loc. + level of #160. J.H. 12/12/30. 1 block. 29416 162. Large jaw, one side. Loc. + level of #160. J.H. 12/12/30. 1 block. 29413 163. Dinosaur vertebra. Chubutiano, profile p. 82. G.G.S. 12/11/30. 1 pack. 3220 CA"AD�N VACA 28902 28736 28795-28805 164. 500+ teeth, jaws, etc. Mostly on surface, but most or all from bed indicated on profile, p. 96. C.S.W. + G.G.S. 12/20-23/30 28465-73 5 packages. 28413-28429 28450-56 28479-80 28493-95 28587