Testing Astronomical and 40Ar/39Ar Timescales for the K/Pg Boundary Interval Using High-Resolution Magnetostratigraphy and U-Pb Geochronology in the Denver Basin of Colorado

William Clyde, University of New Hampshire Main Campus, Durham, NH, United States, Samuel A Bowring, Massachusetts Institute of Technology, Cambridge, MA, United States, Kirk R Johnson, National Museum of Natural History, Washington, DC, United States, Jahandar Ramezani, MIT-EAPS, Cambridge, MA, United States and Matthew Madden Jones, University of Michigan, Ann Arbor, MI, United States