'; ?>
click to enlarge
62 This is the Bed Y of various profiles (A, I, J, K, L, M, N), generally about 100' ? 120' above the Argiles Fissilaires. It is a tuff, often massive pure and white, elsewhere less pure and pinkish, in one or two places with manganese stains, but almost always forming a prominent salient. The base is usually sharp + somewhat undulating, the upper part grades variously into less pure tuffs. Not far above it there is usually a yellowish band. Fossils occur in and immediately above this, also at various levels below for a maximum of about 130! "Lower Channel": The top of the Notostylopense depends on laboratory study, but it appears in the field that it may be below another fairly continuous bed, marked "LOWER CHANNEL SERIES" In Profile A, G + X in I + J. At its base near A it has a heavy conglomerate, with numerous fragmentary fossils. Traced continuously eastward it changes character + becomes a pink tuff which may or may not be unconformable on beds below. Still farther east it cannot be traced continuously but there are other pink beds and channel beds (as in + near prof. M) which may be the same. It doesn't contain very good fossils, but we have identifiable specimens from many points which should clear it up. Its fauna seems unlike that of any beds below. It may be: [See p. 74] COLI-HUAPI 63 246. Several jaws, etc. Profile, p. 38. G.G.S. 11/18/30. 1 pack. 28819-21 247. Isolated teeth, etc. Profile p. 40. G.G.S. 11/18/30. 1 pack. 248. Various. As #246. J.H. 11/18/30. 1 pack. 28449 28738-46 249. Two jaws + frag. skull. As #246. J.H. 11/18/30. 1 pack. 28893 250. Skull frag. As #246. J.H. 11/18/30. 1 pack. 28896 251. Three isol. teeth, and some armadillo scutes. As #242. G.G.S. 11/19/30. 1 pack. 28858 252. Jaw frag. Profile p. 46. J.H. 11/19/30. 1 pack. 28822-3 253. Various. Profile p. 46. J.H. 11/19/30. 1 pack. 28594-5 254. Molars. Profile, p. 46. J.H. 11/19/30. 1 pack. 28639 255. Various, near level of #254, but not definitely in place. J.H. 11/19/30. 1 pack 28433 28463 28598 28637 28859