Auxiliary Material Submission for Paper 2012JF002688R Laser (U-Th)/He thermochronology of detrital zircons as a tool for studying surface processes in modern catchments Alka Tripathy, Kip Hodges, Brian Monteleone, Matthijs van Soest (Arizona State University, Tempe) Introduction The following supplementary materials include all datasets discussed in the manuscript. 1. Analytical techniques 2. Laser microprobe (U-Th)/He thermochronology dataset of sample 07-AT-LB-B. 3. Laser microprobe (U-Th)/He thermochronology dataset of Sri Lankan zircon standard. 3. Conventional (U-Th)/He thermochronology dataset of sample 07-AT-LB-B.