Regional Trends in the Geology. Hercynian-Mauritanide Orogen. of the Appalachian-Caledonian- G.Kelling. Paul E. Schenk. R.T.Haworth. P. F.

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1 Regional Trends in the Geology of the Appalachian-Caledonian- Hercynian-Mauritanide Orogen edited by Paul E. Schenk Department of Geology, Dalhousie University, Halifax, Nova Scotia, Canada Associate editors R.T.Haworth Geological Survey of Canada, Dartmouth, Nova Scotia, Canada J.D. Keppie Nova Scotia Department of Mines and Energy, Halifax, Nova Scotia, Canada W. E. Trzcienski Department of Geology, University of Montreal, Montreal, Quebec, Canada P. F. Williams Department of Geology, University of New Brunswick, Fredencton, New Brunswick, Canada G.Kelling Department of Geology, University of Keele, Keele, England UNIVERSITATSBIBLIOTHEK HANNOVER TECHNISCHE INFORMATIONSBIBLIOTHEK D. Reidel Publishing Company Dordrecht / Boston / Lancaster Published in cooperation with NATO Scientific Affairs Division

2 An PREFACE xi 1. GEOPHYSICS HAWORTH, R. T. Geophysics and Geological Correlation within the Appalachian-Caledonide-Hercynian-Mauritanide - Orogens Introduction 1 ROY, J. L., TANCZYK, E., and LAPOINTE, P. The Paleomagnetic Record of the Appalachians II SEGUIN, M. K. and FYFFE, L. R. Paleomagnetism of Lower Carboniferous (Tournaisian to Namurian) Volcanic Rocks of New Brunswick, Canada, and its Tectonic Implications 27 MILLER, H. G. Gravity and Magnetic Studies of Crustal Structure in Newfoundland 29 HOOD, P. J. Compilation of Canadian Magnetic Anomaly Maps: A Status Report 39 KANE, M. F. Gravity Evidence of Crustal Structure in the United States Appalachians 45

3 WOLFF, F. C. Crustal Structure of the Scandinavian Peninsula as Deduced by Wavelength Filtering of Gravity Data 55 ROUSSEL, J. and LECORCHE, J.-P. Regional Gravity Trends Associated with the Mauritanides Orogen (West Africa) 63 LEFORT, J. P. and KLITGORD, K. D. Geophysical Evidence for the Existence of Mauritanide Structures Beneath the U. S. Atlantic Coastal Plain 73 STRATIGRAPHY AND SEDIMENTOLOGY POOLE, W. H., McKERROW, W. S., KELLING, G. and SCHENK, P. E. A Stratigraphic Sketch of the Caledonide- Appalachian-Hercynian Orogen 75 GEE, D. G. and STURT, B. A. Comments on the Stratigraphic/Structural Evolution of Scandinavia 113 BEN SAID, M. Comments on the Stratigraphic Evolution of Morocco 117 SCHENK, P. E. The Meguma Terrane of Nova Scotia, Canada - an Aid in Trans-Atlantic Correlation 121 SKEHAN, J. W. and RAST, N. Relationship between Precambrian and Lower Paleozoic Rocks of Southeastern New England and other North Atlantic Avalonian Terrains 131 VOLCANISM AND PLUTONISM STEPHENS, M. B., FURNES, H., ROBINS, B. and STURT, B. A. Volcanism and Plutonism in the Caledonides of Scandinavia 163 FRANCIS, E. H., KENNAN, P. S. and STILLMAN, C. J. Volcanism and Plutonism in Britain and Ireland 167

4 FYFFE, L. R., RANKIN, D., SIZE, W. B. and WONES, D. R. Volcanism and Plutonism in the Appalachian Orogen 173 CABANIS, B. Main Features of Volcanism and Plutonism in Late Proterozoic and Dinantian Times in France METAMORPHISM BRYHNI, I. Regional Overview of Metamorphism in the Scandinavian Caledonides 193 FETTES, D. J. Metamorphism in the British Caledonides 205 LONG, C. B., MAX, M. D., and YARDLEY, B. W. D. Compilation Caledonian Metamorphic Map of Ireland 221 GUIDOTTI, C. V., TRZCIENSKI, HOLDAWAY, M.- J. W. E. and A Northern Appalachian Metamorphic Transect - Eastern Townships, Quebec Maine Coast to the Central Maine Coast 235 ROBINSON, P. Realms of Regional Metamorphism in Southern New England, with Emphasis on the Eastern Acadian Metamorphic High 249 FISHER, G. V. Metamorphism in the U. S. Appalachians Overview and Implications 259 SANTALLIER, D. S. Main Metamorphic Features of the Paleozoic Orogen in France DEFORMATION KEPPIE, J. D., GEE, D. G., ROBERTS, D., POWELL, D., MAX, M. D., OSBERG, P., PIQUE, A. and LECORCHE, J. P. Proceedings of the Deformation Study Group, Caledonide Orogen Project 275

5 A vfli GEE, D. G. and ROBERTS, D. Timing of Deformation in the Scandinavian Caledonides 279 POWELL, D. Time of Deformation in the British Caledonides 293 MAX, M. D. Deformation in the Irish Caledonides 301 KEPPIE, J. D., ST. JULIEN, P., HUBERT, C, BELAND, J., SKIDMORE, B., FYFFE, L. R., RUITENBERG, A. A., McCUTCHEON, S. R., WILLIAMS, H., and BURSNALL, J. Times of Deformation in the Canadian Appalachians 307 OSBERG, P. H. Timing of Orogenic Events in the U. S. Appalachians 315 PIQUE, A. Structural Domains of the Hercynian Belt in Morocco 339 LECORCHE, J.-P. Structure of the Mauritanides SYMPOSIUM KENNAN, P. S. and KENNEDY, M. J. - Coticules Key to Correlation Along the Appalachian-Caledonian Orogen? 355 RUITENBERG, A. A. and FYFFE, L. R. Metallic Mineral Zonation Related to Tectonic Evolution of the New Brunswick Appalachians 363 COLMAN-SAAD, S. P. Evidence for the Allochthonous Nature of the Dunnage Zone in Central Newfoundland 375 WILLIAMS, P. F., KARLSTROM, K. E. and VAN DER PLUIJM, B. Thrusting in the - New World Island Hamilton Sound Area of Newfoundland 377

6 ix OSMASTON, M. F. Plate Kinematic Origins of Carboniferous Offshore Basins of Eastern Canada, with and Implications for Taconian and Later Motions 379 CHORLTON, L. Early Paleozoic Tectonic Development of South western Newfoundland LIST OF PARTICIPANTS SUBJECT INDEX 391