Excerpt from The Surface-History of the Earth The Surface History dealt with in this book is based directly upon two great recent advances in our knowledge of the earth's crust: the Radioactivity of the Rocks and Isostasy. The nature of both are herein discussed and explained. Both are recognized to-day by most men of science as facts. These two fundamental elements of the surface constitution of the globe lead naturally to certain great events which at long intervals are recurrent in the history of. The earth's surface. ...
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Excerpt from The Surface-History of the Earth The Surface History dealt with in this book is based directly upon two great recent advances in our knowledge of the earth's crust: the Radioactivity of the Rocks and Isostasy. The nature of both are herein discussed and explained. Both are recognized to-day by most men of science as facts. These two fundamental elements of the surface constitution of the globe lead naturally to certain great events which at long intervals are recurrent in the history of. The earth's surface. Such are (a) the slow advance of transgressional seas upon the continents; those seas in which the sandstones and limestones, &c., so common over all parts of the land surface, have been laid down (5) the retrogression of those seas taking place after many millions of years and then, finally, (6) the rising of the mountain ranges, built mainly of the sediments which were collected in the depths of the former continental waters. For the genesis of the mountains great lateral as well as vertical forces are required, and these also arise naturally out of those fundamental elements of surface structure: Radioactivity and Isostasy. In the course of this history we recognize eras of tensile crust - stresses changing gradually to eras of compressive stresses. Inter 4124 we find an explanation of the limited scale of the surface relief of the earth; of the causes which have controlled the allocation of land and water upon the globe; and of the major geographical relations of continents and oceans. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... 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.
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