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Avalonian and Cadomian Geology of the North Atlantic (Paperback, Softcover reprint of the original 1st ed. 1990)
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Avalonian and Cadomian Geology of the North Atlantic (Paperback, Softcover reprint of the original 1st ed. 1990)
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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.
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