Minnesota / Wisconsin Lake St. Croix sediment cores 1B and 6B. These samples were used for the following publications: Edlund et al. 2009. Twentieth century eutrophication of the St. Croix River (Minnesota–Wisconsin, USA) reconstructed from the sediments of its natural impoundment. J. Paleolimn. DOI 10.1007/s10933-008-9296-1. Triplett et al. 2009. A whole-basin stratigraphic record of sediment and phosphorus loading to the St. Croix River, USA. J. Paleolimn. DOI 10.1007/s10933-008-9290-7 Edlund et al. 2009. From paleo to policy: partitioning the historical point and nonpoint phosphorus loads to the St. Croix River, Minnesota-Wisconsin, USA. J. Paleolimn. DOI 10.1007/s10933-008-9288-1