Source, age, and eruptive mechanisms of Rotorua Ash
- 1 April 1980
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Geology and Geophysics
- Vol. 23 (2), 193-207
- https://doi.org/10.1080/00288306.1980.10424206
Abstract
Rotorua Ash is a widespread (>10 000km2) pyroclastic fall deposit erupted during extrusion of a rhyolite lava complex sited adjacent to the Lake Tikitapu basin, 10 km south-east of Rotorua City, North Island, New Zealand. The eruption was plinian in character, with maximum rate of emission occurring early in the eruption sequence to produce a high (c. 20 km) eruption column. Later explosions accompanied extrusion of lavas. Local, near-vent, pyroclastic flow and surge deposits may have resulted from periods of column collapse. Extrusion of a lava flow from the main pyroclastic vent appears to have terminated the eruption. A 14C age of 13 800 ± 250 years B.P. (new T 1/2) has been obtained for Rotorua Ash close to the source.Keywords
This publication has 17 references indexed in Scilit:
- Volcanic eruption clouds and the thermal power output of explosive eruptionsJournal of Volcanology and Geothermal Research, 1978
- Explosive eruptions and pyroclastic avalanches from Ngauruhoe in February 1975Journal of Volcanology and Geothermal Research, 1978
- Erosion by volcanic base-surge density currents: U-shaped channelsGSA Bulletin, 1977
- A model for the formation of ignimbrite by gravitational column collapseJournal of the Geological Society, 1976
- Grain size variations in ignimbrites and implications for the transport of pyroclastic flowsSedimentology, 1976
- Named tephras and tephra formations occurring in the Central North Island, with notes on derived soils and buried paleosolsNew Zealand Journal of Geology and Geophysics, 1973
- Relation of the Earthquake Flat Breccia to the Rotoiti Breccia, Central North Island, New ZealandNew Zealand Journal of Geology and Geophysics, 1973
- Two Plinian Pumice-Fall Deposits from Somma-Vesuvius, ItalyGSA Bulletin, 1973
- Structure and eruptive history of the Tarawera Volcanic ComplexNew Zealand Journal of Geology and Geophysics, 1970
- Gigantic eruption of the volcano bezymiannyBulletin of Volcanology, 1959