Tectonics and Geophysics of Continental Rifts

The NATO Advanced Study Institute "Paleorift Systems with Emphasis on the Permian Oslo Rift" was held at Sundvollen near Oslo, Norway, 26. July - 5. August, 1977. The meeting included 6 field trips to various parts of the Oslo Region. 70 official participants and 16 observers from 14 countries attended the meeting. The majority of the invited lectures, short research papers and progress reports presented at the meeting are published in two volumes, of which this is volume No. II. A table of con tents for both volumes is include8 herein. The field trip guide is being published in the Nor~gian Geological Survey Series, Vol. 327 (1978). We are especially pleased to acknowledge the efforts of the many authors of contributed papers, and the able assistance of secretaries, proof-readers and other staffmembers without whose help these volumes would not have been possible. Oslo, 20. February 1978. Ivar B. Ramberg Else-Ragnhild Neumann xi Organizing Committee members: O. Eldholm Department of Geology, University G. Gr Ct. nlie of Oslo J. Naterstad I.B. Ramberg (chairman) J.A. Dons Mineralogical-Geological Museum, B.T. Larsen (secretary) University of Oslo E.-R. Neumann (secretary) K.S. Heier (chairman) Norwegian Geological Survey S. Huseby B. Sundvoll M.A. Sellevoll Seismological Observatory, University of Bergen K. Storetvedt Geophysics Institute, University of Bergen P.M. Ihlen Geological Institute, University of Chr. Oftedahl Trondheim F.M. Vokes E.S. Husebye NTNF/NORSAR, 2007 Kjeller This volume is Scientific Report No. 40 of the Geodynamics Project.

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Proceedings of the NATO Advanced Study Institute, Oslo, Norway, July 27-August 5, 1977

Contenu
General Aspects of Rifting.- Evolution of Continental Rift Systems in the Light of Plate Tectonics.- Evolution of the Earth's Crust.- The Origin and Evolution of Rifts and Rift Valley Structures: A Mechanistic Interpretation.- Experimental Model Studies of Rift-Valley Systems (Abstract).- Rates of Sedimentation and Vertical Subsidence in Neorifts and Paleorifts.- Active Continental Rifts.- Deep Structure and Evolution of the Baikal Rift Zone.- Two Stages Rhinegraben Rifting.- The Rio Grande Rift and A Diapiric Mechanism for Continental Rifting.- Owens Valley A Major Rift between the Sierra Nevada Batholith and Basin and Range Province, USA.- Paleorifts.- Rift Systems in the Western United States.- The Late Precambrian Central North American Rift System A Survey of Recent Geological and Geophysical Investigations.- An Early Paleozoic Continental Rift System in Galicia (NW Spain).- The Midland Valley as a Rift, Seen in Connection with the Late Palaeozoic European Rift System.- Main Geologic Features of the Oslo Graben.- The Tectonic History of the Oslo Region.- The Oslo Region during the Early Palaeozoic.- Continental Margins.- The Margin South of Australia A Continental Margin Paleorift.- Passive Continental Margins and Intra-Cratonic Rifts, A Comparison.- Observations on the Margin off Norway (6670°N) and the History of Early Cenozoic Rifting.- Pelagic Sedimentation in Immature Ocean Basins.- North Sea Rift and Basin Development.- Geophysical Studies.- A Comparison of Magnetic Anomalies in the Red Sea and the Gulf of Aden.- Palaeomagnetism in the Oslo Rift Zone.- Seismic Mapping of the Fennoscandian Lithosphere and Asthenosphere with Special Reference to the Oslo Graben Region.- The Ideal-Body Concept in Interpretation of the Oslo Rift Gravity Data andtheir Correlation with Seismic Observations.- Comparative Studies.- Comparison of the East African Rift System and the Permian Oslo Rift.- A Comparison between the Older (Karroo) Rifts and the Younger (Cenozoic) Rifts of Eastern Africa (Abstract).- Main Features of Evolution and Magmatism of Continental Rift Zones in the Cenozoic.- The St. Lawrence Paleo-Rift System: A Comparative Study.- Some Problems of Rifting Development in the Earth's History.- Rift Valleys on Earth, Mars and Venus.- Paleorifts Concluding Remarks.