Purchas Hill (also Te Tauoma) is one of the volcanoes in the Auckland Volcanic Field. It was a twin-cratered scoria cone around 50 m high, located north of Mount Wellington, before it was quarried away. The scoria cone sat in the middle of its large explosion crater with surrounding tuff ring. It was erupted about 10,000 yrs ago, shortly before the eruption of its larger neighbour, Mt Wellington. Hochstetter named it after the Reverend Arthur Guyon Purchas (1821-1906), in gratitude for his help with his geological work on the Field.
- City of Volcanoes: A geology of Auckland - Searle, Ernest J.; revised by Mayhill, R.D.; Longman Paul, 1981. First published 1964. ISBN 0-582-71784-1.
- Volcanoes of Auckland: The Essential Guide. Hayward, B.W., Murdoch, G., Maitland, G.; Auckland University Press, 2011.
- View looking north from Mount Wellington in 1921, with Purchas Hill in foreground.
- 1850s diagram of Mt Wellington and Purchas Hill.
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