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Pouakai Range
The Pouakai Range is an eroded and heavily vegetated stratovolcano in the North Island of New Zealand, located northwest of Mount Taranaki. It consists of the remains of a collapsed Pleistocene stratovolcano. The range is surrounded by a ring plain of lahar deposits from a massive collapse that has been dated as roughly 250,000 years old. The region has been reshaped more recently after each cone collapse from Mount Taranaki. Geology The Pouakai Range volcano is situated in the Taranaki Basin and is part of the Taranaki Volcanic Lineament which has had a 30 mm/yr north to south migration over the last 1.75 million years. Present-day seismicity and stress directions in eastern Taranaki are consistent with back-arc extension processes. The Taranaki Volcanic Lineament members as they decrease in age from northwest to southeast are: # Paritutu, and the Sugar Loaf Islands from 1.75 Ma # Kaitake from 575 ka #Pouakai 210–250 ka #Mount Taranaki <200 ka Volcani ...
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Mount Taranaki
Mount Taranaki (), also known as Mount Egmont, is a dormant stratovolcano in the Taranaki region on the west coast of New Zealand's North Island. It is the second highest point in the North Island, after Mount Ruapehu. The mountain has a secondary cone, Fanthams Peak ( mi, Panitahi), , on its south side. Name The name ''Taranaki'' comes from the Māori language. The Māori word means mountain peak, and is thought to come from , meaning "shining", a reference to the snow-clad winter nature of the upper slopes. It was also named and by iwi who lived in the region in "ancient times". Captain Cook named it Mount Egmont on 11 January 1770 after John Perceval, 2nd Earl of Egmont, a former First Lord of the Admiralty who had supported the concept of an oceanic search for ''Terra Australis Incognita''. Cook described it as "of a prodigious height and its top cover'd with everlasting snow," surrounded by a "flat country ... which afforded a very good aspect, being clothed with wood ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intrusive Rock
Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form ''Igneous intrusion, intrusions'', such as batholiths, dike (geology), dikes, Sill (geology), sills, laccoliths, and volcanic necks.Intrusive RocksIntrusive rocks accessdate: March 27, 2017.Igneous intrusive rocks, accessdate: March 27, 2017.Britannica.comintrusive rock , geology , Britannica.com accessdate: March 27, 2017. Intrusion is one of the two ways igneous rock can form. The other is extrusive rock, extrusion, such as a Types of volcanic eruptions, volcanic eruption or similar event. An intrusion is any body of intrusive igneous rock, formed from magma that cools and solidifies within the crust of the planet. In contrast, an ''extrusion'' consists of extrusive rock, formed above the surface of the crust. Some geologists use the term plutonic rock synonymously with intrusive rock, but other geologists subdivide intrusive rock, by crystal size, into coarse-grai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Taranaki
A volcano is a rupture 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 often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Ranges Of Taranaki
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sugar Loaf Islands
The Sugar Loaf Islands (often Sugarloaf; mi, Ngā Motu, ) are a collection of five small uninhabited islands and several sea stacks near Port Taranaki, New Zealand. The largest, Moturoa Island, covers approximately . Motumahanga is the island furthest from shore, at approximately . Ngā Motu was one of the first areas inhabited by descendants of Te Whiti o Rongomai, and the islands and reefs were all named by Ngāti Te Whiti. The island group was given its English name in 1770 by James Cook because the reminded him of the way sugar was stored in heaps in Europe. The Sugar Loaf Islands Marine Protected Area (SLIMPA) was established in 1991 to protect the area from oil exploration. This strengthened the protection that had been in place since the formation of a marine park in 1986. In 2013 New Plymouth district councillors unanimously agreed to gift the protected area back to the government for Treaty of Waitangi claims and settlements, treaty settlement negotiations with Taranak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taranaki Basin
The Taranaki Basin is an onshore-offshore Cretaceous rift basin on the West Coast of New Zealand. Development of rifting was the result of extensional stresses during the breakup of Gondwanaland. The basin later underwent fore-arc and intra-arc basin development, due to the subduction of the Pacific Plate under the Australian Plate at the Hikurangi Subduction System. The basin covers approximately 100,000 km2 of which the majority is offshore. The basin contains mostly marine sediment, with significant terrestrial sediment from the Late Cretaceous to the Eocene. The majority of New Zealand's oil and gas production occurs within the basin, with over 400 wells and approximately 20 oil and gas fields being drilled. Overview The Taranaki Basin lies on the West coast of the North Island of New Zealand in the Taranaki Region, and is approximately 400 km west of the current Pacific-Australian plate boundary. It covers approximately 100,000 km2 and contains up to 9 k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
