New Zealand's Volcanic and Alpine Landscapes

New Zealand straddles the boundary between the Australian and Pacific tectonic plates, a collision that produces sharply different landscapes on its two main islands. Beneath the central North Island, the Pacific Plate subducts westward beneath the Australian Plate along the Hikurangi margin, generating the Taupo Volcanic Zone, one of the most productive centers of silicic volcanism on Earth. Lake Taupo itself occupies the caldera of a supervolcano whose most recent major eruption, the Hatepe eruption, is dated to around 232 CE and is estimated to have been one of the most violent volcanic events of the last 5,000 years, ejecting roughly 30 cubic kilometers of material. Nearby, Tongariro National Park, established in 1887 as New Zealand's first national park and only the fourth in the world, contains the active volcanoes Ruapehu, Ngauruhoe, and Tongariro; UNESCO granted it dual World Heritage status, first for its natural values in 1990 and then, in 1993, becoming the first property in the world listed for its associative cultural landscape, reflecting its spiritual significance to Māori.