Figure 1. Tectonic reconstructions for the Indo-Australian Archipelago and South-west Pacific region from Zahirovic et al. (2016). Orange demarcates putative mountain building, yellow subaerial land, light blue shallow sea (flooded continental, shelf, and volcanic plateau crust) and dark blue deep sea. Note the composite nature and changing configuration of Wallacea, the greatly varying position of key ribbon arc terranes, and the consistent inference of an isolated proto-Papuan Archipelago across all time slices.