. Corals and coral islands. Coral reefs and islands; Corals. 246 CORALS AND CORAL ISLANDS. obstruction from reefs. Any growing patches within thera may still grow, and the margins of the enclosing reef may gradually extend and contract their limits; yet only at an ex- tremely slow rate. Notwithstanding such changes, the chan- nels will remain open, and large anchorage grounds clear, as. WHIPPET HARBOK, VITI LEVU. long as the currents continue in action. Coral harbors are therefore nearly as secure from any new obstructions as those of our continents. The growing of a reef in an adjoining part
. Corals and coral islands. Coral reefs and islands; Corals. 246 CORALS AND CORAL ISLANDS. obstruction from reefs. Any growing patches within thera may still grow, and the margins of the enclosing reef may gradually extend and contract their limits; yet only at an ex- tremely slow rate. Notwithstanding such changes, the chan- nels will remain open, and large anchorage grounds clear, as. WHIPPET HARBOK, VITI LEVU. long as the currents continue in action. Coral harbors are therefore nearly as secure from any new obstructions as those of our continents. The growing of a reef in an adjoining part of the coast, may in some instances diminish or alter the currents, and thus prepare the way for more important chan- ges in the harbor; but such effects need seldom be feared, and results from them would be appreciable only after long periods, since, even in the most favorable circumstances, the growth of reefs is very slow. When channels have a bottom of growing coral, they form an exception to the above remark; for since the coral is acted upon by no cause sufficient to prevent its growth, the reef will continue to rise slowly toward 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 Dana, James Dwight, 1813-1895. New York, Dodd & Mead
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyo, bookyear1874
