Chromium Isotopes in Carbonate Rocks: New Insights into Proterozoic Atmospheric Oxygenation

Geoffrey J Gilleaudeau, George Mason University, Department of Atmospheric, Oceanic, and Earth Sciences, Fairfax, United States, Robert Frei, University of Copenhagen, Geoscience and Natural Resource Management, København K, Denmark, Alan Jay Kaufman, University of Maryland, College Park, United States, Linda C Kah, University of Tennessee, Department of Earth and Planetary Sciences, Knoxville, TN, United States, Karem Azmy, Memorial University of Newfoundland, Department of Earth Sciences, St John's, Canada, Julie K Bartley, Gustavus Adolphus College, St. Peter, MN, United States, Pavel Chernyavskiy, University of Nebraska Lincoln, Statistics, Lincoln, United States and Andrew H Knoll, Harvard University, Department of Organismic and Evolutionary Biology, Cambridge, MA, United States