Department of Geological & Environmental Sciences, Stanford University, Stanford, CA 94305-2115 United States
Department of Geological & Environmental Sciences, Stanford University, Stanford, CA 94305-2115 United States
Department of Geological & Environmental Sciences, Stanford University, Stanford, CA 94305-2115 United States
Department of Geological & Environmental Sciences, Stanford University, Stanford, CA 94305-2115 United States ; Stanford Synchrotron Radiation Laboratory, SLAC, 2575 Sand Hill Road, Menlo Park, CA 94025 United States