20230727 12125800 1.0 TRUE Tectonic layers This map shows the main tectonic features of the region surrounding Te Riu-a-Māui / Zealandia. Earth's eighth continent is c. 5 Mkm2 in area and 95% submerged. Like all continents, it has a foundation of old, hard, crystalline rocks and a cargo of younger sedimentary basins and volcanoes. Te Riu-a-Māui / Zealandia is surrounded by oceanic crust of various ages and cut by the active Pacific-Australia plate boundary. Mortimer, N., Smith Lyttle, B., Black, J. 2020.