BOTHNER, Michael H., US Geological Survey, USGS Woods Hole Science Center, Woods Hole, MA 02543, CASSO, Michael A., US Geological Survey, USGS Woods Hole Science Center, 384 Woods Hole Rd, Woods Hole, MA 02543-1598, DREVNICK, Paul E., INRS-ETE, Université du Québec, 490 de la Couronne, Québec, QC G1K 9A9, Canada, HAMMERSCHMIDT, Chad R., Department of Earth & Environmental Sciences, Wright State University, 3640 Colonel Glenn Hwy, Dayton, OH 45435, LAMBORG, Carl H., Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, ABBOTT, April, Department of Geological Sciences, Large Lakes Observatory, University of Minnesota, Duluth, MN 55812 and HARKNESS, Jennifer S., Earth and Ocean Science, Duke University, Durham, CA 27701, mbothner@usgs.gov, mbothner@usgs.gov