other domes like Hinemoa Point, Ngongotahā, Pohaturoa and Pukeroa. The most recent magmatic eruption occurred less than 25,000 years ago, creating some of the smaller lava domes. Mokoia Island has been assigned an age of less than 50,000 years. 240,000 years ago Ohakuri paired eruption The first major volcanic event 240,000 years ago was the initial Mamaku eruption followed within a hours/days/weeks of a smaller eruption (phase 1) from the same mush body feeding the Ohakuri Caldera about to the south. Ignimbrite, up to thick was deposited in the surrounding area to the south of Rotorua. Between Rotorua and Ohakuri crosssections of the ash and ignimbrite from the two eruptions have been able to be sequenced completely and have relationships that can only be explained by a sequence of eruptions separated on occasions by days or less (e.g. no rainfall between eruptions). The pairing was possibly through tectonic coupling of separate magma bodies that co-evolved from a lower in the mantle common mush body, as paired events are being increasingly recognised. The maximum outflow dense-rock equivalent (DRE) of the Ohakuri ignimbrite is 100 cubic kilometres (24 cu mi) which means the combined eruptions produced of material. It has been postulated that the drainage of the linked deep magma mush body between Rotorua and Ohakuri resulted in more than of vertical displacement on the Horohoro Fault scarp and formed the Paeroa Graben, coincident to the north with the Kapenga Caldera between it and the Paeroa Fault to the east. This is an area known as the Horohoro Cliffs escarpment and displaced Mamaku ignimbrite from the Rotorua Caldera eruption by this amount, presumably shortly after at least the initial the eruption. This fault, in the present day, while active has a much lower displacement rate of the order of /year and has been assigned by some as the outer western fault of the modern Taupō Rift although most think this is further to the east. Understanding that there is volcanotectonic interrelationship lead to a complete reinterpretation of events in the Taupō Volcanic Zone in the last 250,000 years. See also List of volcanoes in New Zealand Taupō Volcanic Zone Taupō Volcano Volcanology of New Zealand References External links Rotorua at Volcano World Taupō Volcanic Zone Rotorua Calderas of New Zealand VEI-7 volcanoes Volcanoes of the Bay of Plenty Region Rotorua Volcanic Centre Pleistocene calderas Geothermal areas in New Zealand