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Géologie des marges continentales
346 sediment. There are chapters on silica diagenesis, dolomitization, and the generation of hydrocarbons. Sedimentology can be strongly recommended to students of the Earth Sciences as an authoritative text which gives a welcome emphasis to the scientific basis of the subject. At the publisher's price it is excellent value for money. J.R.L. ALLEN (Reading)
G~ologie des Marges Continentales (Geology of the Continental Margins) 2e ~dition. G. Boillot. Masson, Paris, 1983, viii + 139 pp. (Paperback). The second edition of this book, four years after the first, gives evidence of the success of this Introduction to the Geology of the Continental Margins. Therefore the author does not change his foreword and text, except in few parts by introducing up-to-date acquirements and referencing several recent works. In Chapter 2, the new concept a b o u t the formation of the rifts by thermal subsidence is expounded and other hypotheses are proposed to account for the crustal thinning. The crustal-creep hypothesis in the first edition is suppressed; the thinning by extension of the continental crust is better explained in this second edition. Half of the figures were reviewed or replaced for updating this chapter. The paragraph on the seismic effects of subduction, in Chapter 4, is completed by the recent observations of the Japanese geophysists on the doubleplaned deep seismic zone. The concluding arguments on the model of tectonic accretion are more positive than in the first edition. The references to further reading, at the end of the b o o k instead of each chapter, are more numerous (55 against 30 in the first edition) and morerecent. This b o o k remains an elementary teaching manual for post-graduate geology course and provides a synthesis and a broad presentation of present concepts on the evolution of continental margins for anyone interested by understanding of the mechanics of earth movements, continental drift, earthquakes, sea-floor spreading and the complex working of the earth's interior. c. BLOT (Paris)
Cyclic and Event Stratification.
G. Einsele and A. Seilacher (Editors). Springer, Berlin, 1982, xiv + 536 pp. (180 figs.), DM 60.00/approx. US $26.70 (Paperback).
A workshop concerned with Cyclic and Event Stratification was held in Tfibingen in the Spring of 1980. An international gathering of lecturers, mostly coming from Germany, England and the U.S.A. presented papers
G~ologie des Marges Continentales (Geology of the Continental Margins) 2e ~dition. G. Boillot. Masson, Paris, 1983, viii + 139 pp. (Paperback). The second edition of this book, four years after the first, gives evidence of the success of this Introduction to the Geology of the Continental Margins. Therefore the author does not change his foreword and text, except in few parts by introducing up-to-date acquirements and referencing several recent works. In Chapter 2, the new concept a b o u t the formation of the rifts by thermal subsidence is expounded and other hypotheses are proposed to account for the crustal thinning. The crustal-creep hypothesis in the first edition is suppressed; the thinning by extension of the continental crust is better explained in this second edition. Half of the figures were reviewed or replaced for updating this chapter. The paragraph on the seismic effects of subduction, in Chapter 4, is completed by the recent observations of the Japanese geophysists on the doubleplaned deep seismic zone. The concluding arguments on the model of tectonic accretion are more positive than in the first edition. The references to further reading, at the end of the b o o k instead of each chapter, are more numerous (55 against 30 in the first edition) and morerecent. This b o o k remains an elementary teaching manual for post-graduate geology course and provides a synthesis and a broad presentation of present concepts on the evolution of continental margins for anyone interested by understanding of the mechanics of earth movements, continental drift, earthquakes, sea-floor spreading and the complex working of the earth's interior. c. BLOT (Paris)
Cyclic and Event Stratification.
G. Einsele and A. Seilacher (Editors). Springer, Berlin, 1982, xiv + 536 pp. (180 figs.), DM 60.00/approx. US $26.70 (Paperback).
A workshop concerned with Cyclic and Event Stratification was held in Tfibingen in the Spring of 1980. An international gathering of lecturers, mostly coming from Germany, England and the U.S.A. presented papers