Excerpt from Geology, Vol. 2 of 3The salient features of the purpose and plan of this work were set forth in the preface to Volume I, published two years ago. The subject of that volume, Geological Processes and their Results, is sufficientlyMoreExcerpt from Geology, Vol.
2 of 3The salient features of the purpose and plan of this work were set forth in the preface to Volume I, published two years ago. The subject of that volume, Geological Processes and their Results, is sufficiently distinct from the theme of these volumes, The History of the Earth, to give occasion for additional prefatory remarks.
Though the subjects are thus measurably distinct, they have been given a common bond by the treatment of the geological processes in a historical way, on the one side, and by the development of the earth history on dynamical lines, on the other.
Not only has the history been treated from a causal point of view in these volumes, but processes and principles have been discussed wherever the phase of the history has seemed to make such discussion particularly pertinent. Such special discussions have usually been introduced at the first stage in the history at which the phenomena they are intended to elucidate were declared features, or at which their expression is well suited to treatment.
Sometimes, however, they have been delayed, to avoid emphasizing too many dynamic subjects at a given stage. Sometimes, too, the dynamic treatment has been divided between successive historical expressions, as when the subject is very complex, or when different phases are best expressed at different historical stages. This is the case, for example, with the dynamics of deformation, which were treated at some length in Volume I, are further discussed in the chapters on the origin and the early stages of the earth, are again touched upon in connection with several periods when deformation was pronounced, and are reverted to finally in the last chapter, in their application to the peculiar phenomena of the continental borders.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books.
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