- Manawatu-Whanganui Region
| Houghton, B.F., Hackett, W.R. (1984) Strombolian and phreatomagmatic deposits of Ohakune craters Ruapehu New Zealand: a complex interaction between external water and rising basalitic magma, Journal of Volcanology and Geothermal Research, 21, 207-231. Hackett W R. , Geology and petrology of Ruapehu Volcano and related vents, 1985 PhD thesis, Victoria University of Wellington, 311 pp |