Dissolved inorganic carbon isotope signatures in ferruginous lakes: new insights into ancient carbonate isotope excursions

Chad Wittkop1, Elizabeth Swanner2, Nicholas Lambrecht2, Joshua Torgeson1, Sergei Katsev3 and Amy Myrbo4, (1)Minnesota State University Mankato, Mankato, MN, United States, (2)Iowa State University, Department of Geological and Atmospheric Sciences, Ames, IA, United States, (3)University of Minnesota Duluth, Department of Physics and Astronomy, Duluth, United States, (4)University of Minnesota Twin Cities, LacCore/CSDCO, Minneapolis, MN, United States