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Basement hydrogeology and fortification of the Channel Islands: legacies of British and German military engineering

By
N. S. Robins
N. S. Robins
British Geological Survey, Maclean Building, Wallingford, Oxfordshire OX10 8BB, UK
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E. P. F. Rose
E. P. F. Rose
Department of Earth Sciences, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK
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C. S. Cheney
C. S. Cheney
States of Jersey, Planning and Environment Department, Howard Davis Farm, La Route de la Trinité, Trinity, Jersey JE3 5JP, Channel Islands
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Published:
January 01, 2012

Abstract

The islands of Jersey, Guernsey, Alderney and Sark lie close to the Normandy coast of France. They expose a largely Precambrian crystalline basement of metamorphic and igneous rocks – Jersey and Alderney also expose some early Palaeozoic clastic sediments – and all have a thin but widespread Quaternary sedimentary cover. The three largest islands were progressively fortified by the British between the early 13th and mid-19th centuries, and by German forces during occupation in World War II, a legacy illustrated by the castles, forts and numerous German coastal fortifications that still adorn them. A German military geologist based on Jersey from mid-1941 to mid-1944, and a military geological team on Guernsey and Alderney during 1942, generated hydrogeological maps and reports that were then in advance of understanding of crystalline basement aquifers elsewhere in the British Isles. All the major documents have now been found in Germany, the USA and UK, although none survived on the islands themselves. Geological mapping and hydrogeological studies postwar under the auspices of the British Geological Survey were completed without access to German data. However, German and British data together now facilitate an appraisal of the heavily stressed aquifers on these small, hard-rock islands over an unusually long (65 year) timespan.

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Contents

Geological Society, London, Special Publications

Military Aspects of Hydrogeology

E. P. F. Rose
E. P. F. Rose
Royal Holloway, University of London, UK
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J. D. Mather
J. D. Mather
Royal Holloway, University of London, UK
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Geological Society of London
Volume
362
ISBN electronic:
9781862396104
Publication date:
January 01, 2012

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