Barbara Mahler Jennifer T. Wilson Edward Callender Peter C. Van Metre 2006 <p>This report presents data on major and trace element concentrations in sediment cores collected from 35 lakes and reservoirs during 1994-2001. The lakes and reservoirs are located in or near 18 major urban areas across the United States and provide a geographically diverse coverage of urban land use for the country as well as some reference settings. Vertical intervals of the cores were analyzed for eight major elements and eight trace elements.</p> application/pdf 10.3133/ds166 en U.S. Geological Survey Major and trace elements in 35 lake and reservoir sediment cores from across the United States, 1994-2001 reports