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P180 Remarks, Cerro Redondo We give the new name "Cerro Redondo" for our own convenience of record to the round hill one league almost due west Puerto Visser. The section was taken barometrically, checked by leveling, in a SSW-NNE direction from the deep zanjon south of the hill in which the upper beds of the Salamanqueano are exposed. Mammals surely in place were found in sand about 37 meters above the Salamanqueano. As usual in such continental deposits, there are numerous local (& possible regional) uncomformities, but no real break in three series can be detected stratigraphically. The section is about 4-5 km. Distant from the localities where mammals were found in the tuffs at Lomas Blancas. In the large baranca just across the Zanjon from Cerro Redondo & facing P181 North an almost identical series is exposed. Judging from these, top of the Cerro is very close to the level of the "Eocene" tuffs intercolated between the sand-clay series and the Patagoniano.