The Structure and Distribution of Coral Reefs

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Excerpt from The Structure and Distribution of Coral Reefs: Being the First Part of the Geology of the Voyage of the Beagle, Under the Command of Capt. Fitzroy, R. N Nor does this fact, if fully established, falsify my generalisation that volcanos in a state of action are not found within the areas of subsidence, whilst they are often present within those of elevation, for I have not been influenced in my judgment by the absence or presence of coral-reefs round active volcanos, I have judged only by finding upraised marine remains within the areas of elevation, and by the vicinity of atolls and barrier-reefs with reference to the areas of subsidence. Professor Dana apparently supposes (p. 320) that I look at fringing-reefs as a proof of the recent elevation of the land, but I have expressly stated that such reefs, as a general rule, indicate that the land has either long remained at the same level or has been recently elevated. Nevertheless, from upraised recent remains having been found in a large number of cases on coasts which are fringed by coral-reefs, it appears that of these two alternatives recent elevation has been much more frequent than a stationary condition. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.