gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.2.24 Carbon Isotopic Composition of Wetlands Sediments as Indicator of Salinity and Vegetation Change in Brackish Marshes Ingram B. L. Department of Geology and Geophysics, University of California, Berkeley, CA 94720, USA Malamud-Roam F. Byrne R. Department of Geography, University of California, Berkeley, CA 94720, USA Conrad M. E. Center for Isotope Geochemistry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA 1998 62A 2 679 680 Copyright © 1998, The Mineralogical Society 1998