The classical Appalachian, Caledonian, Hercynian, and Mauritanide orogens are now only segments of a once-continuous Paleozoic mountain belt which has been fragmented during Mesozoic-Cenozoic formation of the North Atlantic Ocean. These segments are major parts of the countries surrounding the North Atlantic - most of which are members of NATO. The aim of this NATO conference was to evaluate these fragments in terms of their pre-Mesozoic positions, and to attempt a synthesis of their geologic evolution on an international and orogen-wide scale. Geologists who have studied these scattered remnants have been separated by both geography and discipline. Orogen-wide syntheses have beeen attempted in the past by individuals who are specialists not only in discipline but also in geography; therefore, these attempts have not been satisfactory to everyone. This conference brought together the foremost specialists in different disciplines from each country. They attempted to teach other specialists, not only in their own fields, but in other disciplines, about regional variations and particular problems. The resulting international cross-fertilization, both within and between speciaLties, enriched individual workers and helped to provide a multi-disciplinary overview of the orogen.

Proceedings of the NATO Advanced Study Institute, Atlantic Canada and Fredericton, New Brunswick, Canada, August 2-17, 1982

Inhalt

Geophysics.- Geophysics and Geological Correlation within the Appalachian-Caledonide-Hercynian-Mauritanide Orogens An Introduction.- The Paleomagnetic Record of the Appalachians.- Paleomagnetism of Lower Carboniferous (Tournaisian to Namurian) Volcanic Rocks of New Brunswick, Canada, and its Tectonic Implications.- Gravity and Magnetic Studies of Crustal Structure in Newfoundland.- Compilation of Canadian Magnetic Anomaly Maps: A Status Report.- Gravity Evidence of Crustal Structure in the United States Appalachians.- Crustal Structure of the Scandinavian Peninsula as Deduced by Wavelength Filtering of Gravity Data.- Regional Gravity Trends Associated with the Mauritanides Orogen (West Africa).- Geophysical Evidence for the Existence of Mauritanide Structures Beneath the U. S. Atlantic Coastal Plain.- 2. Stratigraphy and Sedimentology.- A Stratigraphic Sketch of the Caledonide-Appalachian-Hercynian Orogen.- Comments on the Stratigraphic/Structural Evolution of Scandinavia.- Comments on the Stratigraphie Evolution of Morocco.- The Meguma Terrane of Nova Scotia, Canada an Aid in Trans-Atlantic Correlation.- Relationship between Precambrian and Lower Paleozoic Rocks of Southeastern New England and other North Atlantic Avalonian Terrains.- 3. Volcanism and Plutonism.- Volcanism and Plutonism in the Caledonides of Scandinavia.- Volcanism and Plutonism in Britain and Ireland.- Volcanism and Plutonism in the Appalachian Orogen.- Main Features of Volcanism and Plutonism in Late Proterozoic and Dinantian Times in France.- 4. Metamorphism.- Regional Overview of Metamorphism in the Scandinavian Caledonides.- Metamorphism in the British Caledonides.- Compilation Caledonian Metamorphic Map of Ireland.- A Northern Appalachian Metamorphic Transect Eastern Townships, Quebec Maine Coast to the Central Maine Coast.- Realms of Regional Metamorphism in Southern New England, with Emphasis on the Eastern Acadian Metamorphic High.- Metamorphism in the U. S. AppalachiansOverview and Implications.- Main Metamorphic Features of the Paleozoic Orogen in France.- 5. Deformation.- Proceedings of the Deformation Study Group, Caledonide Orogen Project.- Timing of Deformation in the Scandinavian Caledonides.- Time of Deformation in the British Caledonides.- Deformation in the Irish Caledonides.- Times Of Deformation In The Canadian Appalachians.- Timing of Orogenic Events in the U. S. Appalachians.- Structural Domains of the Hercynian Belt in Morocco.- Structure of the Mauritanides.- 6. Symposium.- Coticules - A Key to Correlation Along the Appalachian-Caledonian Orogen?.- Metallic Mineral Zonation Related to Tectonic Evolution of the New Brunswick Appalachians.- Evidence for the Allochthonous Nature of the Dunnage Zone in Central Newfoundland.- Thrusting in the New World Island Hamilton Sound Area of Newfoundland.- Plate Kinematic Origins of Carboniferous and Offshore Basins of Eastern Canada, with Implications for Taconian and Later Motions.- Early Paleozoic Tectonic Development of Southwestern Newfoundland.- 7. List Of Participants.- 8. Subject Index.