The hill is thought to have been a section of Mount Victoria's upper scoria cone which was rafted downslope with lava flows.[1]
References
^Cameron, Ewen; Hayward, Bruce; Murdoch, Graeme (2008). A Field Guide to Auckland: Exploring the Region's Natural and Historical Heritage (rev. ed.). Random House New Zealand. p. 149. ISBN978-1-86962-1513.
City of Volcanoes: A geology of Auckland - Searle, Ernest J.; revised by Mayhill, R.D.; Longman Paul, 1981. First published 1964. ISBN0-582-71784-1.
Volcanoes of Auckland: The Essential guide - Hayward, B.W., Murdoch, G., Maitland, G.; Auckland University Press, 2011.