Lake Pupuke / Maori Name: Pupukemoana "overflowing lake"
Location: Centre of Takapuna, North Shore, Auckland, New Zealand
Type of Volcano: Caldera
Age: 140000 - 150000 years old
Depth: Uncertain, but ranges from 34-75m

Lake Pupuke began with small eruptive activity at generating thin magma flows. Magma withdrawing back down the vent of the volcano would have formed the large collapsed crater.
Larger eruptions then expelled ash, creating a low tuff ring around the crater. It is known as an explosion crater and is one of the oldest in Auckland.
On the areas just west of the volcano, the frothy lava expelled formed a small scoria mound. The volcano later filled with fresh water to become the Lake Pupuke we know today.
Lake Pupuke covers 107 hectares with a shoreline of 4.3 kilometres.