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Terranes in the British and Irish Ordovician

By
N. H. Woodcock
N. H. Woodcock
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Published:
January 01, 2000

Abstract

The tectonic controls on Ordovician geology have become much better known since publication of the first edition of this correlation chart (Williams et al. 1972).Of particular relevance to this new edition is the recognition that some fault-bounded regions of Britain and Ireland have geological histories that contrast with adjacent areas. Such regions have come to be known as terranes (e.g. Dewey 1982; Williams & Hatcher 1982). A contrast in the history of adjacent terranes may indicate some degree of former geographical separation, later reduced by terrane amalgamation along the bounding faults.

The terranes of interest here are those with an internal continuity of their Ordovician facies, faunas and structures, but which are separated by large faults or shear zones from adjacent terranes having different Ordovician geology. Both the number of Ordovician terranes represented in the British Isles and the magnitude of their relative displacements are subjects of continuing debate. In this changeable research climate, it has been one aim of this new correlation chart to provide at least one stratigraphical column from each terrane or important sub-terrane. This section outlines the terrane analyses that have guided this choice of columns. Detailed intra-and inter-terrane relationships are discussed in appropriate sections of this report.

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Geological Society, London, Special Publications

A revised correlation of Ordovician Rocks in the British Isles

R. A. Fortey
R. A. Fortey
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D. A. T. Harpe
D. A. T. Harpe
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J. K. Ingham
J. K. Ingham
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A. W Owen
A. W Owen
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M. A. Parkes
M. A. Parkes
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A. W. A. Rushton
A. W. A. Rushton
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N. H. Woodcock
N. H. Woodcock
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Geological Society of London
Volume
24
ISBN electronic:
9781862396920
Publication date:
January 01, 2000

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