. The ocean [microform]. Marine biology; Marine animals; Marine plants; Biologie marine; Faune marine; Flore marine. 258 THE OCEAN. matter, so that living coral is still near the surface; the superior vigour of the species inhabiting the sea- ward edge, however, has caused that edge to be more. SECTION OP CORAL ISLAND. elevated than the interior, as at d,d; so that the appearance is now that of a rocky isle, diminished in extent, surrounded by a reef at some distance, sepa- rated by the intervention of a shallow channel, e, e; this is exactly the appearance of Tahiti and the larger islands gen
. The ocean [microform]. Marine biology; Marine animals; Marine plants; Biologie marine; Faune marine; Flore marine. 258 THE OCEAN. matter, so that living coral is still near the surface; the superior vigour of the species inhabiting the sea- ward edge, however, has caused that edge to be more. SECTION OP CORAL ISLAND. elevated than the interior, as at d,d; so that the appearance is now that of a rocky isle, diminished in extent, surrounded by a reef at some distance, sepa- rated by the intervention of a shallow channel, e, e; this is exactly the appearance of Tahiti and the larger islands generally, as I shall mention more fully when I come to the volcanic formation. The subsi- dence still goes on; and, after a while, the water, ^, ^, is level with the summit of the island, which, of course, is now an island no longer; the grov/th of the coral has kept pace with the depression, and it is still at the surface, as at 8,8; the more slowly grow- ing species of the interior are still overflowed, and, as the island is submerged in the centre, the water, », », is no longer an annular channel, but a round lagoon | and thus we have an atoll, as at first described. The subsequent process of elevating and clothing the new islets is a rapid one. Chamisso observes, "As soon as it has reached such a height that it remains ahnost dry at low water at the time of ebb, 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 Gosse, Philip Henry, 1810-1888. London : Printed for the Society for Promoting Christian Knowledge
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