Robertson Hill (also Sturges Park, Mount Robertson or Te Tapuwae a Mataoho) is one of the

volcano A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most oft ...

es in the

Auckland volcanic field The Auckland volcanic field is an area of monogenetic volcanoes covered by much of the metropolitan area of Auckland, New Zealand's largest city, located in the North Island. The approximately 53 volcanoes in the field have produced a divers ...

in New Zealand. It erupted approximately 24,300 years ago. The hill, alongside

Māngere Lagoon Māngere Lagoon is a lagoon in the Manukau Harbour, New Zealand. It occupies a volcanic crater or maar which is part of the Auckland volcanic field. Oval and about 600m long, it has a small restored scoria island remaining in the centre. Geogr ...

Waitomokia Waitomokia (also Moerangi, Gabriel Hill or Mount Gabriel) is a volcano in the Auckland volcanic field. Waitomokia's wide tuff crater contained three small scoria cones up to high, one with a crater, which were quarried in the 1950s. Geology ...

Crater Hill Crater Hill is one of the volcanoes of the Auckland volcanic field, in New Zealand. It consists of an explosion crater about wide, partly filled with water. The hill, alongside Māngere Lagoon, Waitomokia, Kohuora Kohuora, located in the ...

Kohuora Kohuora, located in the suburb of Papatoetoe, is one of the volcanoes in the Auckland volcanic field in the North Island of New Zealand. Geology and geography The Kohuora complex is a freshwater wetland found in a tuff ring, that has an explo ...

and Pukaki Lagoon, is one of the volcanic features collectively referred to as Nga Tapuwae a Mataoho ("The Sacred Footprints of

Mataoho Mataaho (also known as Mataaoho and Mataoho) is a Māori deity. Variously considered a god of earthquakes and eruptions, the guardian of the earth's secrets, the god of volcanic forces, or a giant, Mataaho is associated with many of the volcan ...

"), referring to the deity in

Tāmaki Māori Tāmaki Māori are Māori ''iwi'' and ''hapū'' (tribes and sub-tribes) who have a strong connection to Tāmaki Makaurau (the Auckland Region), and whose rohe was traditionally within the region. Among Ngā Mana Whenua o Tāmaki Makaurau (the M� ...

myths who was involved in their creation. Its

scoria Scoria or cinder is a pyroclastic, highly vesicular, dark-colored volcanic rock formed by ejection from a volcano as a molten blob and cooled in the air to form discrete grains called clasts.Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackso ...

cone reaches 78 metres above sea level (around 28 m above the surrounding land). The cone sits in the centre of a large explosion (

maar A maar is a broad, low-relief volcanic crater caused by a phreatomagmatic eruption (an explosion which occurs when groundwater comes into contact with hot lava or magma). A maar characteristically fills with water to form a relatively shallow ...

) crater with the

tuff ring Phreatomagmatic eruptions are volcanic eruptions resulting from interaction between magma and water. They differ from exclusively magmatic eruptions and phreatic eruptions. Unlike phreatic eruptions, the products of phreatomagmatic eruptions cont ...

arc still present around the south and east sides. In the 20th century, the scoria cone crater was reshaped into a sports oval with terraced seating, and is the home ground of Otahuhu RFC.

References

*''City of Volcanoes: A geology of Auckland'' - Searle, Ernest J.; revised by Mayhill, R.D.; Longman Paul, 1981. First published 1964. . *''Volcanoes of Auckland: A Field Guide''. Hayward, B.W.; Auckland University Press, 2019, 335 pp. . Auckland volcanic field Māngere-Ōtāhuhu Local Board Area {{Auckland-geo-stub