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The SUMAC Lab welomes Mendenhall Postdoc Seth Burgess, who will be developing a refined approach for dating Quaternary tephras by combining in-situ U-Th and U-Pb analyses on the SHRIMP with (U-Th)/He ages from zircon using a multicollector noble gas mass spectrometer.

Charlie Bacon retired in October after 39 years with the U.S. Geological Survey in Menlo Park and, for the past 6 years, as Co-Director of the Stanford–USGS SHRIMP lab. Jorge Vazquez is the new Co-Diirector of the SHRIMP lab for USGS. See our "personnel" page for current staffing of the lab. Charlie is staying on with USGS as emeritus scientist, keeping his Menlo Park office, and continuing to work on projects in Alaska and the Cascades.

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