1Department of Earth Sciences and Ocean Process Analysis Laboratory, University of New Hampshire, Durham, New Hampshire 03824
2Dept of Geological Sciences, Michigan State University, East Lansing, Michigan 48824
3Department of Earth Sciences and Jackson Estuarine Laboratory, University of New Hampshire, Durham, New Hampshire 03824
4Dept. of Earth Sciences, University of New Hampshire, Durham, New Hampshire 03824
5Jackson Estuarine Laboratory, University of New Hampshire, Durham, New Hampshire 03824