. Bulletin de recherche sur les atolls. Les récifs coralliens et d'îles ; biologie marine ; sciences de la mer. La figure 1. La plaque lithosphérique du Pacifique, la surface de la plaque du Pacifique mais la majorité de ces monolithes ignées semblent ne jamais avoir atteint la surface de l'océan et ont donc été conservée intacte de modifications liées à l'altération et l'érosion subaérienne. Les monts sous-marins du Pacifique n'est qu'occasionnellement rompre la surface de l'océan formant des îles. Certaines de ces îles reflètent les caractéristiques des monts sous-marins submergés mais prennent la forme de grands pics volcaniques. Plus souvent qu'ils prennent la forme de seamount

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. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Figure 1. The Pacific lithospheric plate, the surface of the Pacific plate but the majority of these igneous monoliths appear never to have reached the ocean surface and have therefore been preserved intact from alterations associated with subaerial weathering and erosion. Only occasionally do Pacific seamounts break the ocean surface forming islands. Some of these islands reflect characteristics of the submerged seamounts but take the form of tall volcanic peaks. More frequently they take the form of seamounts apparently truncated near sea level, capped by carbonate deposits, and variously described as atolls or reefs. Another striking feature of the Pacific plate is that islands of whatever type are normally only found in the somewhat shallower parts of the ocean near the East Pacific Rise, or where ocean temperatures normally remain above 22 C throughout the year. Although fewer in number volcanic islands have received much more attention from geoscientists and geologists interested in origins and dynamics than their carbonate counterparts the atolls. It was only following WWII that the Pacific Science Board of the National Academy of Sciences organized a major program into atoll research and the text, Atoll En)iAOnm<Lnt and Ecology by Harold Wiens (1962), represented a synthesis of this work. Perhaps partial blame for this lopsided research thrust was due to the seemingly explicable and visually more dynamic characteristics of volcanoes as compared to the confusion and disagreement surrounding the low, relatively featureless, atolls. Although back in 1842 Darwin proposed the simple yet elegant explanation that these atolls resulted from the slow submergence of volcanic islands his ideas were contested and went unproven until 1951 when drilling through the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili

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