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Wiri Lava Cave
Wiri lava cave is Auckland's longest known lava cave A lava cave is any cave formed in volcanic rock, though it typically means caves formed by volcanic processes, which are more properly termed volcanic caves. Sea caves, and other sorts of erosional and crevice caves, may be formed in volcanic roc ... at around 290 metres. It is part of Matukutūruru (Wiri Mountain) volcano, in the Auckland volcanic field. Because it features rare lava stalactites the cave has garnered international renown. The cave entrance is locked and entry is by permit only. The cave is up to , down to , and is located about below Wiri Station Rd. References External links View of Wiri cave interior.2014 views {{coord, -37.006378, 174.8591, region:NZ-AUK, display=title Caves of New Zealand Auckland volcanic field Lava caves Lava tubes Landforms of the Auckland Region ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wiri Lava Cave Auckland
Wiri is a mostly industrial-commercial focused suburb in Auckland, New Zealand. It was formerly part of Manukau City until the merger of all of Auckland's councils into the ' super city' in 2010. The area was named after the chief Takaanini Wirihana. The Wiri inland port connects road freight to the Ports of Auckland on the Waitemata Harbour further north. The inland port allows the Ports of Auckland to reduce the number of trucks that have to travel through the Auckland Central area by up to 100,000 trips per year. Auckland Region Women's Corrections Facility (ARWCF) is located in Wiri. ARWCF is the first purpose-built women's prison in New Zealand to accommodate a growing number of female prisoners and services in the upper North Island. The facility can accommodate 286 prisoners and employs 167 staff. The adjacent Auckland South Corrections Facility is a high security men's prison which opened in 2015. It is operated by Serco New Zealand under a Public Private Partners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auckland
Auckland (pronounced ) ( mi, Tāmaki Makaurau) is a large metropolitan city in the North Island of New Zealand. The List of New Zealand urban areas by population, most populous urban area in the country and the List of cities in Oceania by population, fifth largest city in Oceania, Auckland has an urban population of about It is located in the greater Auckland Region—the area governed by Auckland Council—which includes outlying rural areas and the islands of the Hauraki Gulf, and which has a total population of . While European New Zealanders, Europeans continue to make up the plurality of Auckland's population, the city became multicultural and Cosmopolitanism, cosmopolitan in the late-20th century, with Asian New Zealanders, Asians accounting for 31% of the city's population in 2018. Auckland has the fourth largest Foreign born, foreign-born population in the world, with 39% of its residents born overseas. With its large population of Pasifika New Zealanders, the city is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Cave
A lava cave is any cave formed in volcanic rock, though it typically means caves formed by volcanic processes, which are more properly termed volcanic caves. Sea caves, and other sorts of erosional and crevice caves, may be formed in volcanic rocks, but through non-volcanic processes and usually long after the volcanic rock was emplaced. Types There are many types of lava caves, with these being the most notable: *Lava tubes are the most common and extensive type of lava cave. Lava tubes usually form in pahoehoe lava flows, though exceptions exist. As the lava is emitted from the vent area, it spreads in the path of least resistance. The outer layers of the lava harden, while the interior forms horizontal conduits that channel the advance of the flow. These conduits are the beginning stages of lava tubes that serve to insulate the heat from the lava which then provides a way for the lava flow to advance longer distances. Dependent upon the slope, terrain, and lava viscosity, diffe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 diverse array of maars (explosion craters), tuff rings, scoria cones, and lava flows. With the exception of Rangitoto, no volcano has erupted more than once, but the other eruptions lasted for various periods ranging from a few weeks to several years. Rangitoto erupted several times and recently twice; in an eruption that occurred about 600 years ago, followed by a second eruption approximately 50 years later. The field is fuelled entirely by basaltic magma, unlike the explosive subduction-driven volcanism in the central North Island, such as at Mount Ruapehu and Lake Taupō.Ian E.M. Smith and Sharon R. Allen. Auckland volcanic field geology'. Volcanic Hazards Working Group, Civil Defence Scientific Advisory Committee. Retrieved 30 March 2013. Also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stalagmite
A stalagmite (, ; from the Greek , from , "dropping, trickling") is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings. Stalagmites are typically composed of calcium carbonate, but may consist of lava, mud, peat, pitch, sand, sinter, and amberat (crystallized urine of pack rats). The corresponding formation hanging down from the ceiling of a cave is a stalactite. Mnemonics have been developed for which word refers to which type of formation; one is that ''stalactite'' has a C for "ceiling", and ''stalagmite'' has a G for "ground", another is that, as with ants in the pants, the mites go up and the tights (tites) come down. Formation and type Limestone stalagmites The most common stalagmites are speleothems, which usually form in limestone caves. Stalagmite formation occurs only under certain pH conditions within the cavern. They form through deposition of calcium carbonate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves Of New Zealand
The following is a list of some of the more well known caves and caverns in New Zealand. Not all caves have an official name as set by the New Zealand Geographic Board. The national caving association maintains maps of all known surveyed caves and the name is generally allocated by the group who first discovered the cave. North Island caves *Many lava tubes and lava caves in the Auckland volcanic field, including: ** Rangitoto lava caves **Wiri Lava Cave *Waitomo district: ** Aranui Cave ** Gardner's Gut ** Ruakuri Cave ** Waitomo Cave South Island caves * Broken River Cave * Cathedral Caves * Cave Stream * Clifden Limestone Caves *Honeycomb Hill Cave * Metro Cave / Te Ananui Cave * Mount Arthur caves: ** Ellis Basin cave system ** Nettlebed Cave * Moncks Cave * Mount Owen caves: ** Bohemia Cave ** Bulmer Cavern * Rawhiti Cave * Riwaka Resurgence * Tākaka Hill caves: ** Harwoods Hole ** Ngārua Caves * Te Ana-au Caves ** Aurora Cave See also *List of caves *List of rock f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Caves
Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from . The volcanic rock resulting from subsequent cooling is also often called ''lava''. A lava flow is an outpouring of lava during an effusive eruption. (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows.) The viscosity of most lava is about that of ketchup, roughly 10,000 to 100,000 times that of water. Even so, lava can flow great distances before cooling causes it to solidify, because lava exposed to air quickly develops a solid crust that insulates the remaining liquid lava, helping to keep it hot and inviscid enough to continue flowing. The word ''lava'' comes from Italian and is probably derived from the Latin word ''labes'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Tubes
A lava tube, or pyroduct, is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. If lava in the tube empties, it will leave a cave. Formation A lava tube is a type of lava cave formed when a low-viscosity lava flow develops a continuous and hard crust, which thickens and forms a roof above the still-flowing lava stream. Tubes form in one of two ways: either by the crusting over of lava channels, or from pāhoehoe flows where the lava is moving under the surface. Lava usually leaves the point of eruption in channels. These channels tend to stay very hot as their surroundings cool. This means they slowly develop walls around them as the surrounding lava cools and/or as the channel melts its way deeper. These channels can get deep enough to crust over, forming an insulating tube that keeps the lava molten and serves as a conduit for the flowing lava. These types of lava tubes tend to be closer to the lava erupt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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