R. A. Strachan, G. K. Taylor

Avalonian and Cadomian Geology of the North Atlantic

• Broschiertes Buch

Produktbeschreibung

Avalonian and Cadomian Geology of the North Atlantic aims to provide region by region syntheses of those terranes which are believed to have once formed part of the Late Proterozoic Avalonian-Cadomian belt. The belt originally comprised a series of volcanic arcs and marginal basins formed during the period c. 700-500 Ma ago, producing a range of calc-alkaline volcanics and intrusives and marginal basin sediments partly founded on continental basement rocks. Originally about 9000 km long, the belt is made up of a number of terranes later separated by the Caledonian orogeny (c. 500- 400 Ma), Variscan orogeny (c. 325 Ma), and the recent opening ofthe Atlantic Ocean (c. 70 Ma). The rocks therefore are now located on both sides of the Atlantic, as far apart as Florida and Czechoslovakia. A possible modern analogue for the Avalonian-Cadomian belt may be the present-day Western Pacific margins. We believe that a synthesis such as this provides the basis for correlation of the timing of events and hence improves our understanding of the underlying tectonic framework of the belt. This book developed from the recognition of, first, our own lack of knowledge of contemporaneous events outwith Armorica, and, second, the likelihood that other researchers working on individual areas or terranes do so in relative isolation. We have therefore commissioned chapters from researchers considered to be experts on their own particular areas.

Produktdetails

• Verlag: Springer / Springer Netherlands
• Artikelnr. des Verlages: 978-94-010-6667-9
• Softcover reprint of the original 1st ed. 1990
• Seitenzahl: 268
• Erscheinungstermin: 13. November 2013
• Englisch
• Abmessung: 229mm x 152mm x 15mm
• Gewicht: 403g
• ISBN-13: 9789401066679
• ISBN-10: 9401066671
• Artikelnr.: 39915440

Inhaltsangabe

1 Introduction.- References.- 2 The Longmyndian Supergroup and related Precambrian sediments of England and Wales.- 2.1 Introduction.- 2.2 Longmyndian Supergroup, Welsh Borderland.- 2.3 Old Radnor Inlier, Welsh Borderland.- 2.4 Charnian Supergroup, Leicestershire.- 2.5 Llangynog Inlier, Dyfed.- 2.6 Other outcrops of Precambrian sediments in England and the Welsh Borderland.- 2.7 Depositional setting of the Precambrian sediments.- References.- 3 Pre-Arenig terranes of northwest Wales.- 3.1 Introduction and historical perspective.- 3.2 The Monian Supergroup.- 3.3 The Coedana Complex.- 3.4 The southeast Anglesey blueschists.- 3.5 The Sara Complex.- 3.6 Regional correlations.- 3.7 Overstep sequences and age constraints.- 3.8 Monian tectonics: an overview.- References.- 4 The Rosslare Complex: a displaced terrane in southeast Ireland.- 4.1 Introduction.- 4.2 The Rosslare Complex: constituents and geological history.- 4.3 Rocks marginal to the Rosslare Complex.- 4.4 Caledonian intrusions.- 4.5 Conclusions.- References.- 5 Cadomian terranes in the North Armorican Massif, France.- 5.1 Introduction.- 5.2 St. Brieuc terrane (SBT).- 5.3 St. Malo terrane (SMT).- 5.4 Mancellian terrane (MT).- 5.5 Nature and timing of deformation.- 5.6 Post-Cadomian sedimentation.- 5.7 Regional correlations.- 5.8 Geotectonic setting.- References.- 6 Precambrian of the Bohemian Massif, Central Europe.- 6.1 Introduction.- 6.2 The Bohemian Massif.- 6.3 The Moldanubian.- 6.4 The Brioverian.- 6.5 Unit boundaries.- 6.6 Cadomian deformation.- 6.7 Cadomian metamorphism and plutonism.- References.- 7 Precambrian terranes in the Iberian Variscan Foldbelt.- 7.1 Introduction.- 7.2 Precambrian sequences and history of northwest Iberia suspect terranes.- 7.3 Stratigraphy of Precambrian sequences in the Iberian terrane.- 7.4 Late Precambrian tectono-thermal evolution of the Iberian terrane: the Cadomian orogeny.- References.- 8 The West African orogens and Circum-Atlantic correlatives.- 8.1 Introduction.- 8.2 Mauritanide, Bassaride, and Rokelide orogens.- 8.3 Southern Appalachian orogen.- 8.4 Pre-Cretaceous crystalline basement beneath the Atlantic and Gulf Coastal Plains of the southeastern United States.- 8.5 Appalachian-West African correlations.- 8.6 Terrane accretion in the southern Appalachian orogen.- References.- 9 The Avalon Zone type area: southeastern Newfoundland Appalachians.- 9.1 Introduction.- 9.2 Characteristic lithology and age.- 9.3 Boundaries.- 9.4 Precambrian stratigraphy.- 9.5 Late Precambrian plutonic rocks.- 9.6 Cambro-Ordovician stratigraphy.- 9.7 Mid-Palaeozoic stratigraphy.- 9.8 Palaeozoic plutonic rocks.- 9.9 Mesozoic magmatism.- 9.10 Tectono-thermal history.- 9.11 Synthesis.- References.- 10 The Avalon Composite terrane of Nova Scotia.- 10.1 Introduction.- 10.2 Geological data.- 10.3 Discussion.- References.- 11 The Avalon Zone of New Brunswick.- 11.1 Zone definition.- 11.2 Zone boundaries.- 11.3 Unit descriptions.- 11.4 Regional correlations.- References.- 12 Palaeomagnetic and tectonic constraints on the development of Avalonian-Cadomian terranes in the North Atlantic region.- 12.1 Introduction.- 12.2 Palaeomagnetic constraints on a late Precambrian plate reconstruction.- 12.3 Tectonic synthesis.- References.

Rezensionen

They have succeeded in providing readable and well-referenced accounts illustrated by pertinent geological maps and stratigraphic columns. This will prove to be a useful sourcebook for earth scientists researching these challenging terranes. - Surveys in Geophysics; Good for goelogy collections in university, graduate, and research libraries - New Technical Books; ...can be thoroughly recommended...an important benchmark in Avalonian-Cadomian research. - Geological Magazine