Congratulations to Austin Keirs who successfully defended his M.S. thesis research! Austin combined multi-method thermometry and thermodynamic modeling to determine the pressure-temperature evolution of early subducted rocks in the Easton terrane. Austin's work showed that high-grade amphibolite and blueschist units were metamorphosed at depth at different times and that these early rocks underwent a two-stage cooling process. Cooling first occurred at depth during the early stages of subduction and was followed by later exhumation of the units to shallower levels in the subduction zone. Austin is now pursuing his PhD at UBC Okanagan

• Keirs, A., 2025, Investigating models of metamorphic sole preservation through thermometry and phase equilibrium modeling of the Easton metamorphic suite, Northwest Cascades, Washington, WWU Graduate School Collection.