. Corals and coral islands. Coral reefs and islands; Corals. 218 C0RAL8 AND CORAL ISLANDS. oolites through the action of high waves, the beds are pretty regular in themselves, but slant in every direction toward the sea, showing that they were deposited under the action of winds blowing at different times from every quarter. It is further noteworthy, that, while the thicker layers consist of oolitic grains distinguishable by the naked eye, there are at intervals thin layers of very hard, compact limestone, alterna- ting with the oolitic beds, which have no doubt been formed in the same manner
. Corals and coral islands. Coral reefs and islands; Corals. 218 C0RAL8 AND CORAL ISLANDS. oolites through the action of high waves, the beds are pretty regular in themselves, but slant in every direction toward the sea, showing that they were deposited under the action of winds blowing at different times from every quarter. It is further noteworthy, that, while the thicker layers consist of oolitic grains distinguishable by the naked eye, there are at intervals thin layers of very hard, compact limestone, alterna- ting with the oolitic beds, which have no doubt been formed in the same manner as the coating of the ; / / 0 i. THE BERMUDA ISLANDS. The oolitic limestones, referred to by Prof Agassiz as the description states, are not the true coral reef-rock, the base- ment rock of the reefs, but the superficial beach sand-rock and drift sand-rock of the preceding pages, which are very gener- ally oolitic in structure. The Bermuda^ or Somers' /^ZaTzc^s.—The Bermudas are 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
