AGU member since 1985. Associate research scientist, University of California, Davis. My current research focuses on (1) understanding the interactions between climate change, orbital variations, and short-term geomagnetic field variability, (2) investigating seafloor spreading processes and the origin of marine magnetic lineations, (3) determining the intensity of the ancient magnetic fields of the proto-Sun from chondrules in order to constrain models for the formation of the early solar system, and (4) estimating plate and hot spot motions to place constraints on global geodynamics and the geomagnetic field. B.S., 1984, Indiana University; M.S., 1986, University of Arizona; Ph.D., 1990, Northwestern University. Postdoctoral scholar, Woods Hole Oceanographic Institution (1990–1991); Caswell Silver Distinguished Professor, University of New Mexico (1992–1994); lecturer in geophysics, University of New England (1994–1995); staff scientist/project manager, Ocean Drilling Program, Texas A&M University (1995–2003); Paleomagnetism Laboratory manager/associate research scientist, University of California, Davis (2003 to present). Forty-three refereed articles, 13 in AGU journals. Editor on six Scientific Results volumes for the ODP; guest editor for special issue of Physics of the Earth and Planetary Interiors.