My research interests focus on developing methods for using in situ cosmogenic nuclides (CNs) to derive surface exposure ages and/or erosion rates for process-oriented geomorphic studies. I have developed reliable methods for extracting in situ cosmogenic 14C (in situ 14C) from quartz, and continue to advance those techniques. Recently, I have been using in situ 14C to calibrate variations of in situ CN production rates with altitude and latitude. As an outgrowth of that work, I am also investigating the effects of millennial-scale geomagnetic variability on CN production rates in time and space. I am also applying in situ 14C in concert with long-lived CNs such as 10Be, 26Al, and 36Cl to investigate complex exposure scenarios, particularly involving glacial advance and retreat.
