40Ar/39Ar and paleomagnetic constraints on the age and areal extent of the Picabo volcanic field: Implications for the Yellowstone hotspot

Mark H. Anders1, Victor J. DiVenere2, Sidney R. Hemming3, and Joel Gombiner4 1Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, Virginia 22030, USA 2Department of Earth and Environmental Science, Long Island University, Brookville, New York 11548, USA 3Department of Earth and Environmental Sciences, and Lamont-Doherty Earth Observatory, of Columbia University, Palisades, New York 10964, USA 4Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA