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Project personnel Wells, Ray E., Project Chief Blakely, Richard J., Cox, Brett F. Evarts, Russell C. Fleck, Robert J. Hagstrum, Jonathan T. Haugerud, Ralph A. Mahan, Shannon McDougall, Kristin Sawlan, Michael G. Spritzer, John Tabor, Rowland W. Thoms, Evan Wheeler, Karen L. Project cooperators Booth, Derek B. Niem, Alan Niem, Wendy Tolan, Terry Troost, Kathy Goetz

Shannon Mahan Geochronologist - Geologist U.S. Geological Survey Box 25046 M. S. 974 Denver CO 80225 Telephone- (303) 236-7928 Fax- (303) 236-5556 Email- smahan@usgs.gov SPECIALTIES: Research into luminescence dating of young (<700 Ka) geologic materials in the western US. Supervisor of USGS Luminescence Dating laboratory, which has been in Denver, Colorado since 1992. The lab offers a full range of thermoluminescence, optically stimulated luminescence dating and other techniques using both Daybreak and Riso systems. CURRENT WORK: Shannon's current work includes Geochronology of Pleistocene glacial and interglacial sediments in the Puget Lowland, Washington to establish correlations throughout the lowland and determine deformation rates across the Seattle fault and other structures (with Derek Booth, Kathy Troost, Ray Wells and others). Geochronology of subsurface Pleistocene strata LA Basin-FOQUS drilling program (with Dan Ponti, Jack Hillhouse, Kris McDougall, John Tinsley, Brian Edwards, and others). Geochronology of A horizons, alluvium, dunes, paleolakes as part of the the Mojave Desert Recoverability and Vulnerability study (with Dave Miller, Rich Reynolds and others). Miscellaneous projects, including the Angus, NE mammoth site; Great Sand Dunes National Park; Point Reyes (San Francisco); Cyprus (with Rich Harrison); Albuquerque Basin (with Byron Stone, Jim Cole and Steve Personius); Brigham City, UT paleolake beds (with Dave Miller). LINKS: USGS Central Region capabilities/geochronology Thermoluminescence Primer Sample Preparation PUBLICATIONS: Under construction

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