URANIUM ISOTOPE EVIDENCE FOR REDOX COUPLING OF THE CARBON CYCLE
KAUFMAN, Alan1, GILLEAUDEAU, Geoffrey J.2, CHERRY, Lucas B.2, KULENGUSKI, Joseph T.2 and ELRICK, Maya3, (1)Department of Geology and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20742, (2)Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, 4400 University Drive, Fairfax, VA 22030, (3)Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131