. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. woodworth: geological expedition to brazil and chile. 129 The fifty-five to sixty foot bench at Corral is at that place about fifty feet above the fine of the abandoned sea-caves. What the attitude of this terrace is south of Corral I am unable to state. That the depression of the coast continues increasingly southwards is possibly indicated by the extensive fiord zone however much these channels may have been over-deepened by the Pleistocene glaciers. But Darwin's (1891, p. 233) account of sea-caves not now visited b
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. woodworth: geological expedition to brazil and chile. 129 The fifty-five to sixty foot bench at Corral is at that place about fifty feet above the fine of the abandoned sea-caves. What the attitude of this terrace is south of Corral I am unable to state. That the depression of the coast continues increasingly southwards is possibly indicated by the extensive fiord zone however much these channels may have been over-deepened by the Pleistocene glaciers. But Darwin's (1891, p. 233) account of sea-caves not now visited by the waves on the island of Chiloe, though these small caves may be more recent than those of Corral, shows the necessity of a resurvey of this coast before assuming any uniform rate of tilting over great Fig — Sketch map of country about Concepcion, Chile. Terraces of the Rio Bio Bio wiikin the Coastal Cordillera.— From the delta plain of the Rio Bio Bio at Concepcion there is a series of river terraces Mithin the canon of the river rising in altitude to San Rosendo at the border of the Longitudinal Valley. The railway from Talca- huano to San Rosendo follows the river, rising at a very uniform grade now on a lower terrace and again passing through cuts in the margins of a higher terrace. The following notes w^ere taken on a railway journey from Concepcion to San Rosendo. The ele\ations of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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