The GOGREEN Survey: Rethinking satellite galaxy quenching

I present results from the GOGREEN survey of galaxy evolution in clusters at 1<z<1.5.  From analysis of the stellar mass functions, halo mass variations, and abundance of transition galaxies we show new insight into galaxy evolution at this epoch.  High mass (logM>10.5) quenched galaxies appear to predate the cluster, having been pre-processed in groups or even earlier.  Lower mass galaxies show evidence for infall-driven quenching that is large enough to explain the full excess of quiescent galaxies relative to the field.