Growth by Plate Collisions

In addition to the Wrangellia collision described earlier, remnants of other oceanic plateaus and juvenile oceanic arcs are important. Most of these terranes began to evolve into continental crust at or not long before the time when they accreted to the continent. Subduction-related processes related to collisionally thickened crust result in irreconcilable element enrichment. Similar mechanisms have been proposed for Archean continents \cite{Percival_1989} .