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Geological Society, London, Special Publications; 1995; v. 93; p. 9-16;
DOI: 10.1144/GSL.SP.1995.093.01.02
© 1995 Geological Society of London

A gravity map of Ireland and surrounding waters

P. W. Readman1, B. M. O’Reilly1, J. W. F. Edwards2 & M. J. Sankey2

1 Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland
2 British Geological Survey, Murchison House, West Mains Road, Edinburgh, Scotland

A Bouguer gravity map of Ireland and the surrounding shallow seas has been produced in the form of a vertically illuminated shaded relief image. This method of presentation accentuates subtle trends in the gravity field which reflect complex density variations present in the crust beneath Ireland. These can be correlated with well known geological features in the onshore region, such as Caledonian granites and major faults. The large normal fault systems which bound offshore Mesozoic basins are clearly indicated by strong gravity lineaments with a similar underlying Caledonian trend. In many cases these can be traced onshore to known Caledonian faults. Transverse Caledonian and Variscan tectonic trends are also highlighted by the method.





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