Tauanui is a high basaltic scoria cone in the Kaikohe-Bay of Islands volcanic field in New Zealand and located south east of Tautoro township. It is the youngest volcano of the southern part of the field, having erupted around 60,000 years ago, and also the southernmost of the group. South east of the scoria cone is Lake Tauanui which separates it from the higher non-volcanic Tautoro hill (). To the north west of Tauanui is a smaller scoria cone, Hangunui Pā. To the volcano's north are the rhyolitic Putahi and the andersitic Tarahi volcanoes.
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