. Elements of zoölogy. Zoology. BARRIER REEFS.—ATOLLS. 27 Barrier Reefs.—This name is given to reefs formed as above, but distant from the shore, and separated from it by deep water, as the reef, one thousand miles long and thirty miles from shore, on the Australian coast. Fringing Reefs.—These are formed near the shore, generally in smooth water, having no great depth between them and the adjacent land. Atolls.—When a reef reaches the surface, the waves from the side of the prevailing winds grind up the dead -. Fig. 26.—Atoll in the Pacific Ocean. coral, and wash it over in the form of mud an
. Elements of zoölogy. Zoology. BARRIER REEFS.—ATOLLS. 27 Barrier Reefs.—This name is given to reefs formed as above, but distant from the shore, and separated from it by deep water, as the reef, one thousand miles long and thirty miles from shore, on the Australian coast. Fringing Reefs.—These are formed near the shore, generally in smooth water, having no great depth between them and the adjacent land. Atolls.—When a reef reaches the surface, the waves from the side of the prevailing winds grind up the dead -. Fig. 26.—Atoll in the Pacific Ocean. coral, and wash it over in the form of mud and sand, where it settles in smooth water. Here branching corals, that give shelter to innumerable animals, nourish, as well as lime-secreting algae,* all continually growing and being ground up by fishes and worms, and disintegrated by the solvent action of the carbonic acid in the water, until finally a shallow lagoon or flat is formed, wholly or partly * This is one of the most important factors of lagoon and key making. The keys of Tortugas, especially Sand Key, are made up almost entirely of these limy plates, as well as broken 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 Holder, Charles Frederick, 1851-1915; Holder, Joseph Bassett, 1824-1888, joint author. New York : D. Appleton and company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
