. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. AGASSIZ : BAHAMAS. 131 terraces of the shore line. The height of the bluffs of the shore line, or of the hills corresponding to the third terrace, is about three hundred and fifty feet. Seen from the mouth of Canasi River Gap the limestone hills through which the river has cut its way remind one of the flat hills apparently damming the course of a river in the anthracite region of Pennsylvania. In the background, after passing westward of the gap, the Jaruco hills come into view\ They are greatly eroded as seen from t
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. AGASSIZ : BAHAMAS. 131 terraces of the shore line. The height of the bluffs of the shore line, or of the hills corresponding to the third terrace, is about three hundred and fifty feet. Seen from the mouth of Canasi River Gap the limestone hills through which the river has cut its way remind one of the flat hills apparently damming the course of a river in the anthracite region of Pennsylvania. In the background, after passing westward of the gap, the Jaruco hills come into view\ They are greatly eroded as seen from the sea, and present the characteristic erosion of the vertical cliffs of the limestone hills on the eastern extremity of Cuba. The same seems also to be the case with the hills to the rear of the Santa Cruz cut. Inland behind the ^^ - ., r^^'. SANTA CRUZ GAP. third terrace, where it can be traced near Santa Cruz, the general level of the land appears lower than the terrace in front of it. There seems to have been an extensive valley, parallel with the coast, formed by erosion to the rear of the shore hills. The range of hills extending to the west- ward towards Havana is the continuation of the Sierras do Jaruco. It seems to trend somewhat away from the coast, and also to be considerably lower. The Managua Paps are marked on the chart as not more than seven hundred and thirty-two feet high. In the vicinity of Havana the second row of hills is not of greater heiglit than that of the third ter- race. To the westward of the Jaruco River entrance there are large isolated blocks, the remnants of the soboruco after the general disinte- gration of the first terrace. These indicate cleai'ly the extent of tlie erosion whicli has taken place, and wliicli hns here widened tlie reach of tlie slope of the first terrace towards the base of the cliffs or of the hills forming apart of the second terrace. Professor Dana ^ has called attention to the existence of similar huge masses of reef rock
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