BRACCIALI, Laura, LEC, Lancaster University AND NIGL BGS Keyworth, Nottingham, NG12 5GG, United Kingdom, PARRISH, Randall R., Dept of Geology, University of Leicester, NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, NG12 5GG, United Kingdom, CONDON, Daniel, NERC Isotope Geoscience Laboratory, British Geological Survey, Keyworth, Nottingham, NG12 5GG, United Kingdom, HORSTWOOD, Matthew, NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, NG12 5GG, United Kingdom, and
NAJMAN, Yani, Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom, y.najman@lancs.ac.uk