. The earth and its inhabitants ... Geography. ElVEES OF AMAZONIA. 99 doubt tliat at some remote period the whole region of plains and terraces formed the bed of a vast lake, or of several lakes constituting an American Mediterranean larger than the Canadian lake system, larger even than the Mediterranean of the Old World. In the Pebas cliffs on the Peruvian Maranon, Orton discovered, embedded in layers of many-coloured clays, a mass of marine shells comprising no less than 17 extinct species dating from the close of the Tertiary epoch. At that time the Maranon, issuing from the Manseriche gor
. The earth and its inhabitants ... Geography. ElVEES OF AMAZONIA. 99 doubt tliat at some remote period the whole region of plains and terraces formed the bed of a vast lake, or of several lakes constituting an American Mediterranean larger than the Canadian lake system, larger even than the Mediterranean of the Old World. In the Pebas cliffs on the Peruvian Maranon, Orton discovered, embedded in layers of many-coloured clays, a mass of marine shells comprising no less than 17 extinct species dating from the close of the Tertiary epoch. At that time the Maranon, issuing from the Manseriche gorges, entered the inland sea through a delta, which, gradually advancing eastwards, at last filled the whole plain. Possibly the fluvial waters were then discharged north-eastwards in the direction of the Caribbean Sea through the depression at present traversed Fig. 33.âAMAzoMiN Depression and Outer Zone of the Cataracts. Scale 1 : 36,000,OiX>.. Zone of the Amazons Affluents above the Falls. 1,250 Miles. by the Ptio Negro, the Cassiquiare, and the Orinoco. At least the marine shells of the Upper Amazons resemble the types characteristic of the West Indian waters. In that case, the bluffs of Monte Alegre, the Santarem heights, and the other hills approaching the banks of the Amazons at the Obidos narrows, should be regarded as the remains of the ridge or dyke which formerly closed the basin of the inland sea and of the lakes ascending in terraces up the slopes of the Andes to Lake Titicaca. The Amazonian Floods. As regular in its periodical changes as the Nile itself, the Amazons rises and falls with the alternating seasons by a succession of " ebbs " and "â flows " {(Vichente and vasante), in which the inhabitants recognise a sort of tidal move-. 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 origi
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectgeography
