Regional Trends in the Geology of the Appalachian-Caledonian-Hercynian-Mauritanide Orogen

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. Front Matter....Pages i-xiii Geophysics and Geological Correlation within the Appalachian-Caledonide-Hercynian-Mauritanide Orogens — An Introduction....Pages 1-9 The Paleomagnetic Record of the Appalachians....Pages 11-26 Paleomagnetism of Lower Carboniferous (Tournaisian to Namurian) Volcanic Rocks of New Brunswick, Canada, and Its Tectonic Implications....Pages 27-28 Gravity and Magnetic Studies of Crustal Structure in Newfoundland....Pages 29-38 Compilation of Canadian Magnetic Anomaly Maps: A Status Report....Pages 39-44 Gravity Evidence of Crustal Structure in the United States Appalachians....Pages 45-54 Crustal Structure of the Scandinavian Peninsula as Deduced by Wavelength Filtering of Gravity Data....Pages 55-61 Regional Gravity Trends Associated with the Mauritanides Orogen (West Africa)....Pages 63-71 Geophisycal Evidence for the Existence of Mauritanide Structures Beneath the U. S. Atlantic Coastal Plain....Pages 73-73 A Stratigraphic Sketch of the Caledonide-Appalachian-Hercynian Orogen....Pages 75-111 Comments on the Stratigraphic/Structural Evolution of Scandinavia....Pages 113-115 Comments on the Stratigraphic Evolution of Morocco....Pages 117-119 The Meguma Terrane of Nova Scotia, Canada — An Aid in Trans-Atlantic Correlation....Pages 121-130 Relationship Between Precambrian and Lower Paleozoic Rocks of Southeastern New England and Other North Atlantic Avalonian Terrains....Pages 131-162 Volcanism and Plutonism in the Caledonides of Scandinavia....Pages 163-165 Volcanism and Plutonism in Britain and Ireland....Pages 167-171 Volcanism and Plutonism in the Appalachian Orogen....Pages 173-185 Main Features of Volcanism and Plutonism in Late Proterozoic and Dinantian Times in France....Pages 187-192 Regional Overview of Metamorphism in the Scandinavian Caledonides....Pages 193-204 Metamorphism in the British Caledonides....Pages 205-219 Compilation Caledonian Metamorphic Map of Ireland....Pages 221-233 A Northern Appalachian Metamorphic Transect — Eastern Townships, Quebec Maine Coast to the Central Maine Coast....Pages 235-247 Realms of Regional Metamorphism in Southern New England, with Emphasis on the Eastern Acadian Metamorphic High....Pages 249-258 Metamorphism in the U.S. Appalachians—Overview and Implications....Pages 259-262 Main Metamorphic Features of the Paleozoic Orogen in France....Pages 263-274 Proceedings of the Deformation Study Group, Caledonide Orogen Project....Pages 275-278 Timing of Deformation in the Scandinavian Caledonides....Pages 279-292 Time of Deformation in the British Caledonides....Pages 293-299 Deformation in the Irish Caledonides....Pages 301-306 Times of Deformation in the Canadian Appalachians....Pages 307-313 Timing of Orogenic Events in the U.S. Appalachians....Pages 315-337 Structural Domains of the Hercynian Belt in Morocco....Pages 339-345 Structure of the Mauritanides....Pages 347-353 Coticules — a Key to Correlation Along the Appalachian- Caledonian Orogen?....Pages 355-361 Metallic Mineral Zonation Related to Tectonic Evolution of the New Brunswick Appalachians....Pages 363-373 Evidence for the Allochthonous Nature of the Dunnage Zone in Central Newfoundland....Pages 375-376 Thrusting in the New World Island — Hamilton Sound Area of Newfoundland....Pages 377-378 Plate Kinematic Origins of Carboniferous and Offshore Basins of Eastern Canada, with Implications for Taconian and Later Motions....Pages 379-380 Early Paleozoic Tectonic Development of Southwestern Newfoundland....Pages 381-382 Back Matter....Pages 383-398 Proceedings of the NATO Advanced Study Institute, Atlantic Canada and Fredericton, New Brunswick, Canada, August 2-17, 1982