Physicists attempt to reduce natural phenomena to their essential dimensions by means of simplification and approximation and to account for them by defining natural laws. Paradoxically, whilst there is a critical need in geology to reduce the overwhelming field information to its essentials, it often re mains in an over-descriptive state. This prudent attitude of geologists is dictated by the nature of the subjects being consi dered, as it is often difficult to derive the significant parame ters from the raw data. It also follows from the way that geolo gical work is carried out. Geologists proceed, as in a police investigation, by trying to reconstruct past conditions and events from an analysis of the features preserved in rocks. In physics all knowledge is based on experiment but in the Earth Sciences experimental evidence is of very limited scope and is difficult to interpret. The geologist's cautious approach in accepting evidence gained by modelling and quantification is sometimes questionable when it is taken too far. It shuts out potentially fruitful lines of advance; for instance when refu sing order of magnitude calculations, it risks being drowned in anthropomorphic speculation. Happily nowadays, many more studies tend to separate and order the significant facts and are carried out with numerical constraints, which although they are approxi mate in nature, limit the range of hypotheses and thus give rise to new models.
This book originates in the French classic "Principes de Tectonique" (Masson, 1983), written by professor Adolphe Nicolas, and the more recent "Principes de Tectonique" by J.L. Bouchez and A. Nicolas (De Boeck, 2018). This English edition is an up-to-date and augmented version that keeps the concise and rigorous writing of its inspiring predecessors. It is largely based on laboratory and field experience of both authors, with a focus towards hard rocks and magmatic rocks from both the continental crust worldwide and the mantle, principally from the Oman ophiolites. The book includes more than 250 illustrations, most of them original. In addition to classic geological subjects, the book includes elements such as plastic deformation of ice, quartz and olivine, fabric acquisition in rocks and magmas, measurement and orientation of stress, together with basic background information on neotectonics, geophysics and other practical tools such as magnetic fabrics not commonly treated in geological books. Since the targeted readers are present day young students, a few exercises of structural geology are included to improve their abilities. This book aims principally at students of Geology, at both the undergraduate and graduate levels. However, due to its numerous illustrations and rather concise writing, anyone interested in rock deformation and/or tectonics will find key answers in this book.
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
The exhibition at the Dahesh Museum that the publication of this book celebrates is the first in a century to feature Dagnan Bouveret's work. Against the Modern pays special attention to the evolution of this artist's style and subject matter and brings to the public gaze the real diversity, accessibility - and surprising modernity - that has made Dagnan-Bouveret worthy of our attention today."--BOOK JACKET.
The following third and last part of the Origins of Contemporary France is to consist of two volumes. After the present volume, the second is to treat of the Church, the School and the Family, describe the modern milieu and note the facilities and obstacles which a society like our own encounters in this new milieu: here, the past and the present meet, and the work already done is continued by the work which is going on under our eyes.—The undertaking is hazardous and more difficult than with the two preceding parts. For the Ancient Régime and the Revolution are henceforth complete and finished periods; we have seen the end of both and are thus able to comprehend their entire course. On the contrary, the end of the ulterior period is still wanting; the great institutions which date from the Consulate and the Empire, either consolidation or dissolution, have not yet reached their historic term: since 1800, the social order of things, notwithstanding eight changes of political form, has remained almost intact. Our children or grandchildren will know whether it will finally succeed or miscarry; witnesses of the denouement, they will have fuller light by which to judge of the entire drama. Thus far four acts only have been played; of the fifth act, we have simply a presentiment.—On the other hand, by dint of living under this social system, we have become accustomed to it; it no longer excites our wonder; however artificial it may be it seems to us natural. We can scarcely conceive of another that is healthier; and what is much worse, it is repugnant to us to do so. For, such a conception would soon lead to comparisons and hence to a judgment and, on many points, to an unfavorable judgment, one which would be a censure, not only of our institutions but of ourselves. The machine of the year VIII, applied to us for three generations, has permanently shaped and fixed us as we are, for better or for worse. If, for a century, it sustains us, it represses us for a century. We have contracted the infirmities it imports—stoppage of development, instability of internal balance, disorders of the intellect and of the will, fixed ideas and ideas that are false. These ideas are ours; therefore we hold on to them, or, rather, they have taken hold of us. To get rid of them, to impose the necessary recoil on our mind, to transport us to a distance and place us at a critical point of view, where we can study ourselves, our ideas and our institutions as scientific objects, requires a great effort on our part, many precautions, and long reflection.—Hence, the delays of this study; the reader will pardon them on considering that an ordinary opinion, caught on the wing, on such a subject, does not suffice. In any event, when one presents an opinion on such a subject one is bound to believe it. I can believe in my own only when it has become precise and seems to me proven.
During the night of July 14-15, 1789, the Duc de la Rochefoucauld-Liancourt caused Louis XVI to be aroused to inform him of the taking of the Bastille. "It is a revolt, then?" exclaimed the King. "Sire!" replied the Duke; "it is a revolution!" The event was even more serious. Not only had power slipped from the hands of the King, but also it had not fallen into those of the Assembly. It now lay on the ground, ready to the hands of the unchained populace, the violent and over-excited crowd, the mobs, which picked it up like some weapon that had been thrown away in the street. In fact, there was no longer any government; the artificial structure of human society was giving way entirely; things were returning to a state of nature. This was not a revolution, but a dissolution. Two causes excite and maintain the universal upheaval. The first one is food shortages and dearth, which being constant, lasting for ten years, and aggravated by the very disturbances which it excites, bids fair to inflame the popular passions to madness, and change the whole course of the Revolution into a series of spasmodic stumbles. When a stream is brimful, a slight rise suffices to cause an overflow. So was it with the extreme distress of the eighteenth century. A poor man, who finds it difficult to live when bread is cheap, sees death staring him in the face when it is dear. In this state of suffering the animal instinct revolts, and the universal obedience which constitutes public peace depends on a degree more or less of dryness or damp, heat or cold. In 1788, a year of severe drought, the crops had been poor. In addition to this, on the eve of the harvest, a terrible hail-storm burst over the region around Paris, from Normandy to Champagne, devastating sixty leagues of the most fertile territory, and causing damage to the amount of one hundred millions of francs. Winter came on, the severest that had been seen since 1709. At the close of December the Seine was frozen over from Paris to Havre, while the thermometer stood at 180 below zero. A third of the olive-trees died in Provence, and the rest suffered to such an extent that they were considered incapable of bearing fruit for two years to come. The same disaster befell Languedoc. In Vivarais, and in the Cevennes, whole forests of chestnuts had perished, along with all the grain and grass crops on the uplands. On the plain the Rhone remained in a state of overflow for two months.
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