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Book Chapter

Non-marine Tertiary sediments of western Britain and Ireland

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Published:
January 01, 2016

Abstract

Almost 20 basins filled by largely or wholly non-marine Paleogene sediments have been identi?ed in a roughly north-south zone extending from the Bovey Basin in south Devon to the Little Minch Basin in the Hebrides (Figs 42 & 165). The largest onshore basin is the Lough Neagh Basin, in Northern Ireland (c. 500 km2). Almost all are fault-controlled extensional basins. Many are half-graben, some are pull-apart basins adjacent to strike-slip faults. The best-documented of these faults is the Sticklepath-Lustleigh Fault, a reactivated Variscan fault zone at least 200 km long. Most basins have an initial fill of coarse clastic alluvial fan and fluvial sediments, which fine upwards to alluvial and lacustrine clays, often with thick lignites. The Paleogene fill unconformably overlies Mesozoic or older rocks. In basins in the SW of this area (e.g. Stanley Bank Basin, South Celtic Sea Basin), records of glauconite and dinoflagellates indicate marine in?uence at some levels, reflecting proximity to the North Atlantic.

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Geological Society, London, Special Reports

A revised correlation of Tertiary rocks in the British Isles and adjacent areas of NW Europe

C. King
C. King
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A. S. Gale
A. S. Gale
School of Earth & Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth PO1 3QL, UK
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T. L. Barry
T. L. Barry
Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK
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Geological Society of London
Volume
27
ISBN electronic:
9781862397071
Publication date:
January 01, 2016

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