 An atoll or lagoon island consists of a chaplet or ring of coral, enclosing a lagoon or portion of the ocean in its centre. The average breadth of the part of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom...  On Molecular and Microscopic Science - Page 140by Mary Somerville - 1869Full view - About this book
 | Mary Somerville - 1849 - 450 pages
...enclosing a lagoon or portion of the ocean in its centre. The average breadth of the part of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom rises higher than from 6 to 10 or 12 feet above the waves. Hence the lagoon... | |
 | Cale Pelton - 1851 - 236 pages
...of coral, enclosing a lagoon or portion of the ocean in its centre. The average breadth of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom rises higher than 12 feet above the waves. Hence they are not discernible,... | |
 | Mary Somerville - 1869 - 618 pages
...enclosing a lagoon or portion of the ocean in its centre. The average breadth of the part of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom rises higher than from 6 to 10 or 12 feet above the waves. Hence the lagoon... | |
 | Cale Pelton - 1855 - 246 pages
...of coral, enclosing a lagoon or portion of the ocean in its centre. The average breadth of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom rises higher than 12 feet above the waves. Hence they are not 'discernible,... | |
 | Cale Pelton - 1855 - 250 pages
...of coral, enclosing a lagoon or portion of the ocean in its centre. The average breadth of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom rises higher than 12 feet above the waves. Hence they are not discernible,... | |
 | Edward Thomas Stevens - 1866 - 434 pages
...enclosing a lagoon, or portion of the ocean, in its centre. The average breadth of the part of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom rises higher than from 6 to 10 or 12 feet above the waves. Hence the lagoon... | |
 | William Henry Davenport Adams - 1867 - 142 pages
...transparent water is generally afforded by a navigable channel. The average breadth of that part of the ring above the surface of the sea is about a quarter of a mile, and its height varies from six to twelve feet. Hence, when not covered with a plume of cocoa-nut, palm,... | |
 | George William Cox - 1867 - 1002 pages
...ring of coral, enclosing a lagoon or portion of the ocean in its centre. The average breadth of tho part of the ring which rises above the surface of the sea is nearly a quarter of a mile, and it seldom rises higher than from six to ten or twelve feet above the... | |
 | Lewis Feuchtwanger - 1870 - 362 pages
...inhabitants of the Red Sea alone, and an enormous area of the Tropical Pacific is everywhere erowded with the stupendous works of these minute agents,...mile, often less, and it is seldom more than from six Jo ten or twelve feet above the waves ; hence the lagoon islands are not visible, even at a very small... | |
 | James Johonnot - 1882 - 452 pages
...inclosing a lagoon or portion of the ocean in its center. The average breadth of the part of the ring above the surface of the sea is about a quarter of a mile, oftener less, and it seldom rises higher than from six to ten or twelve feet above the waves. Hence... | |
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