gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.3.163 The Nd Isotope Composition of Ancient Seawater from Foraminifera: Systematics and a Case-Study from the Pleistocene of the Labrador Sea Vance D. Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK Burton K. Department of Geological Sciences, The University of Michigan, Ann Arbor, MI 48109-1063, USA 1998 62A 3 1582 1583 Copyright © 1998, The Mineralogical Society 1998