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927 kr
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Consisting of papers that have appeared recently in International Geology Review, Middle American Terranes, Potential Correlatives, and Orogenic Processes focuses on Middle American terranes in which tectonic processes, including flat-slab subduction, for orogenic development are examined at various times since the late Mesoproterozoic: at 1 Ga, through the Paleozoic, and into the Cenozoic. Many papers relate the evolution of the Middle American terranes over the past billion years to global scale events, and a second theme running through the book relates to the supercontinents, Rodinia and Pangea, the geometry of their amalgamation and breakup, and the processes responsible.Highlights include: · An update on the geographic record, tectonic setting, and provenance of these terranes · Documentation of allocthonous nature and position peripheral to Amazonia of the ~1 Ga basement of southern Mexico · Data demonstrating that the basement rocks were involved in several Phanerozoic tectonic events · An examination of new evidence of a Late Paleozoic event associated with the amalgamation of Pangea overprinting the ~1 Ga basement and the Paleozoic units lying chiefly to the west and south of it · An exploration of the following potential correlatives: (1) events in Europe on the northern margin of Gondwana; (2) the Late Silurian-Devonian Acadian orogeny in the Appalachian, which is inferred to have resulted from flat-slab subduction related to overriding a plume; and (3) Mesozoic-Cenozoic events along the western margin of Laurentia · A discussion of possible mechanisms for the initiation of orogeny, flat-slab subduction in the Laramide orogeny, and hypotheses relating to the amalgamation and breakup of supercontine
2 536 kr
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Consisting of papers that have appeared recently in International Geology Review, Middle American Terranes, Potential Correlatives, and Orogenic Processes focuses on Middle American terranes in which tectonic processes, including flat-slab subduction, for orogenic development are examined at various times since the late Mesoproterozoic: at 1 Ga, through the Paleozoic, and into the Cenozoic. Many papers relate the evolution of the Middle American terranes over the past billion years to global scale events, and a second theme running through the book relates to the supercontinents, Rodinia and Pangea, the geometry of their amalgamation and breakup, and the processes responsible.Highlights include: · An update on the geographic record, tectonic setting, and provenance of these terranes · Documentation of allocthonous nature and position peripheral to Amazonia of the ~1 Ga basement of southern Mexico · Data demonstrating that the basement rocks were involved in several Phanerozoic tectonic events · An examination of new evidence of a Late Paleozoic event associated with the amalgamation of Pangea overprinting the ~1 Ga basement and the Paleozoic units lying chiefly to the west and south of it · An exploration of the following potential correlatives: (1) events in Europe on the northern margin of Gondwana; (2) the Late Silurian-Devonian Acadian orogeny in the Appalachian, which is inferred to have resulted from flat-slab subduction related to overriding a plume; and (3) Mesozoic-Cenozoic events along the western margin of Laurentia · A discussion of possible mechanisms for the initiation of orogeny, flat-slab subduction in the Laramide orogeny, and hypotheses relating to the amalgamation and breakup of supercontine
1 074 kr
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This book represents the third in the series on the Precambrian and Palaeozoic geolo- gy of Circum-Atlantic regions developed under the IGCP (International Geological Correlation Programme) Project # 233 on Terranes in the Circum-Atlantic Palaeo- zoic Orogens. The book is an up-to-date and comprehensive account of the Pre- Mesozoic Geology of France (Armorican and Central Massifs) and related areas (Aquitaine Basin, Vosges, Crystalline Provence, Pyrenees, western Alps, Corsica and Sardinia) that systematically reviews the geophysics, stratigraphy, palaeontology, structure, metamorphism, igneous activity and metallogeny. The need for such a book became apparent at the international copference held in Montpellier, France, in Au- gust, 1988, where a vast amount of new information was presented. The collection of papers presented at the conference and published in Tectonophysics, however, does not give the comprehensive treatment of the geology required for terrane analysis that is provided by this book. We sincerely appreciate the work ofthe reviewers whose comments have helped to ensure that this book has an international appeal.We also thank the authors whose diligent efforts have provided an excellent synthesis. Halifax, Nova Scotia, Canada 1993 J. DUNCAN KEPPlE Contents Part I Geophysics Seismic Reflection Images of the Pre-Mesozoic Crust in France and Adjacent Areas C. BOIS, M. CAZES, P. CHOUKROUNE, O. GARIEL, A. HIRN, B. LE GALL, J. P. LEFORT,P. MATTE,andB. PINET . **...*. *...