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New upgrade enhances stability and allows higher resolution of mass scans, improving our ability to distingush interfering peaks in the mass spectra - particularily at low mass. 

Marsha was nominated for the outstanding MS thesis award in the College of Sciences at SJSU.  Her thesis U-Pb Geochronology of the Miocene Peach Spring Tuff Supereruption And Precursor Cook Canyon Tuff, Western Arizona, USA was in competition for best University thesis of 2014.

USGS Mendenhall Postdoc Seth Burgess has been awarded the Cozzarelli Prize, which recognizes recently published PNAS papers of outstanding scientific excellence and originality. The award recognizes Seth's recent paper entitled "High-precision timeline for Earth’s most severe extinction".

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 dates 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-Director 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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