G.F. Lee Gilbert C. Bortleson 1975 <div id="Abs1-section" class="c-article-section"><div id="Abs1-content" class="c-article-section__content"><p>Chemical analyses from two short cores in Lake Monona show that pronounced changes in chemical stratigraphy have occurred since white man moved into Madison and southern Wisconsin and began modifying the area. Since the mid to late 1800's, there has been an appreciable increase in P, Fe, Mn, Al, and K in the uppermost sediments. Maximum concentrations of P were observed near the turn of the century and in the most recent sediment layers.</p></div></div><div id="cobranding-and-download-availability-text" class="note test-pdf-link"><br></div> application/pdf 10.1007/BF01794132 en Springer Recent sedimentary history of Lake Monona, Wisconsin article