Rangitoto Island

Rangitoto Island is a volcanic island in the Hauraki Gulf near Auckland, New Zealand. The 5.5 km wide island is an iconic and widely visible landmark of Auckland with its distinctive symmetrical shield volcano cone rising 260 metres (850 ft) high over the Hauraki Gulf. Rangitoto is the most recent and the largest (2311 hectares) of the approximately 50 volcanoes of the Auckland volcanic field. It is separated from the mainland of Auckland's North Shore by the Rangitoto Channel. Since World War II it has been linked by a causeway to the much older, non-volcanic Motutapu Island.

Rangitoto is Māori for 'Bloody Sky', with the name coming from the full phrase Ngā Rangi-i-totongia-a Tama-te-kapua ('The days of the bleeding of Tama-te-kapua'). Tama-te-kapua was the captain of the Arawa waka (canoe) and was badly wounded on the island, at a (lost) battle with the Tainui iwi (tribe) at Islington Bay.

Geology

Rangitoto was formed by a series of eruptions commencing at least 6000 years ago, with the most recent eruptions occurring between 550 and 600 years ago. The most recent eruptions occurred in two episodes, 10–50 yrs apart, and are thought to have lasted for several years during the later shield-forming episode. The first recent episode erupted most of the volcanic ash that mantles Motutapu Island next door, and produced the lower, northern, scoria cone. The second episode built most of Rangitoto erupting all the lava flows and main scoria cone at the apex. The 2.3 cubic kilometres of material that erupted from the volcano was about equal to the combined mass produced by all the previous eruptions in the Auckland volcanic field, which were spread over more than 250,000 years.

New Zealand

New Zealand (/njuːˈziːlənd/ new-ZEE-lənd, Māori: Aotearoa [aɔˈtɛaɾɔa]) is an island country in the southwestern Pacific Ocean. The country geographically comprises two main landmasses – that of the North Island, or Te Ika-a-Māui, and the South Island, or Te Waipounamu – and numerous smaller islands. New Zealand is situated some 1,500 kilometres (900 mi) east of Australia across the Tasman Sea and roughly 1,000 kilometres (600 mi) south of the Pacific island areas of New Caledonia, Fiji, and Tonga. Because of its remoteness, it was one of the last lands to be settled by humans. During its long isolation, New Zealand developed a distinctive biodiversity of animal, fungal and plant life. The country's varied topography and its sharp mountain peaks, such as the Southern Alps, owe much to the tectonic uplift of land and volcanic eruptions. New Zealand's capital city is Wellington, while its most populous city is Auckland.

Somewhere between 1250 and 1300 CE, Polynesians settled in the islands that were to become New Zealand, and developed a distinctive Māori culture. In 1642, Abel Tasman, a Dutch explorer, became the first European to sight New Zealand. In 1840, representatives of the British Crown and Māori Chiefs signed the Treaty of Waitangi, making New Zealand a British colony. Today, the majority of New Zealand's population of 4.5 million is of European descent; the indigenous Māori are the largest minority, followed by Asians and Pacific Islanders. Reflecting this, New Zealand's culture is mainly derived from Māori and early British settlers, with recent broadening arising from increased immigration. The official languages are English, Māori and New Zealand Sign Language, with English predominant.

Island

An island /ˈaɪlənd/ or isle /ˈaɪl/ is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be called an eyot or ait, or a holm. A grouping of geographically or geologically related islands is called an archipelago, e.g. the Philippines.

An island may be described as such despite the presence of an artificial land bridge, for example Singapore and its causeway, or the various Dutch delta islands, such as IJsselmonde. Some places may even retain "island" in their names for historical reasons after being connected to a larger landmass by a wide land bridge, such as Coney Island or Coronado Island. Conversely, when a piece of land is separated from the mainland by a man-made canal, for example the Peloponnese by the Corinth Canal, it is generally not considered an island.

There are two main types of islands: continental islands and oceanic islands. There are also artificial islands.

Auckland

Auckland (/ˈɔːklənd/ AWK-lənd), in the North Island of New Zealand, is the largest and most populous urban area in the country. Auckland has a population of 1,454,300, 32 percent of New Zealand's population. It is part of the wider Auckland Region, which includes the rural areas and towns north and south of the urban area, plus the islands of the Hauraki Gulf, resulting in a total population of 1,570,500 that is governed by the Auckland Council. Auckland also has the largest Polynesian population of any city in the world. In Māori, Auckland's name is Tāmaki Makaurau and the transliterated version of Auckland is Ākarana.

The Auckland urban area (as defined by Statistics New Zealand) ranges to Waiwera in the north, Kumeu in the northwest, and Runciman in the south. It is not contiguous; the section from Waiwera to Whangaparaoa Peninsula is separate from its nearest neighbouring suburb of Long Bay. Auckland lies between the Hauraki Gulf of the Pacific Ocean to the east, the low Hunua Ranges to the south-east, the Manukau Harbour to the south-west, and the Waitakere Ranges and smaller ranges to the west and north-west. The central part of the urban area occupies a narrow isthmus between the Manukau Harbour on the Tasman Sea and the Waitemata Harbour on the Pacific Ocean. It is one of the few cities in the world to have two harbours on two separate major bodies of water.

Hauraki Gulf

The Hauraki Gulf / Tīkapa Moana is a coastal feature of the North Island of New Zealand. It has an area of 4000 km², and lies between, in anticlockwise order, the Auckland Region, the Hauraki Plains, the Coromandel Peninsula, and Great Barrier Island. Most of the gulf is part of the Hauraki Gulf Marine Park.

Hauraki is Māori for north wind. In 2014, the gulf was officially named Hauraki Gulf / Tīkapa Moana.

Geography

Gulf

The gulf is part of the Pacific Ocean, which it joins to the north and east. It is largely protected from the Pacific by Great Barrier Island and Little Barrier Island to the north, and by the 80-kilometre-long Coromandel Peninsula to the east. It is thus well protected against all but northern winds.

Three large channels join the gulf to the Pacific. Colville Channel lies between the Coromandel Peninsula and Great Barrier, Cradock Channel lies between the two islands, and Jellicoe Channel lies between Little Barrier and the North Auckland Peninsula. To the north of Auckland several peninsulas jut into the gulf, notably the Whangaparaoa Peninsula. Tiritiri Matangi Island is near the end of this peninsula. Further north, Kawau Island nestles under the Tawharanui Peninsula.