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Terevaka
Mauŋa Terevaka is the largest, tallest () and youngest of three main extinct volcanoes that form Easter Island. Several smaller volcanic cones and craters dot its slopes, including a crater hosting one of the island's three lakes, Rano Aroi. While Terevaka forms the bulk of Easter Island, the island has two older volcanic peaks: Poike which forms the eastern headland and Rano Kau the southern. Terevaka last erupted in the Pleistocene and is less than 400,000 years old. Its lava field at Roiho has been dated at between 110,000 and 150,000 years old. Terevaka can be climbed via a trail that starts next to the moai at Ahu Akivi. Terevaka is the 12th most topographically isolated summit on Earth. Easter Island map-en.svg, Map of Rapa Nui showing Terevaka, Poike and Rano Kau ISS005-E-15458.JPG, Terevaka from space with Hanga Roa above and Rano Kau at top – a west up photo from Nasa See also * List of volcanoes in Chile * List of islands by highest point * Topographic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Easter Island
Easter Island (, ; , ) is an island and special territory of Chile in the southeastern Pacific Ocean, at the southeasternmost point of the Polynesian Triangle in Oceania. The island is renowned for its nearly 1,000 extant monumental statues, called ''moai'', which were created by the early Rapa Nui people. In 1995, UNESCO named Easter Island a World Heritage Site, with much of the island protected within Rapa Nui National Park. Experts differ on when the island's Polynesian inhabitants first reached the island. While many in the research community cited evidence that they arrived around the year 800, a 2007 study provided compelling evidence suggesting their arrival was closer to 1200. The inhabitants created a thriving and industrious culture, as evidenced by the island's numerous enormous stone ''moai'' and other artifacts. Land clearing for cultivation and the introduction of the Polynesian rat led to gradual deforestation. By the time of European arrival in 1722, the i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topographic Isolation
The topographic isolation of a summit is the minimum geographical distance, horizontal distance to a point of equal elevation, representing a radius of dominance in which the peak is the highest point. It can be calculated for small hills and islands as well as for major summit (topography), mountain peaks and can even be calculated for submarine summits. Mount Everest, the highest point on Earth, has an undefined isolation, since there are no higher points to reference. Because topographic isolation can be difficult to determine, a common approximation is the distance to a peak called the nearest higher neighbour (NHN). Isolation table The following sortable table lists Earth's 40 most topographically isolated summits. Examples *The nearest peak to Germany's highest mountain, the high Zugspitze, that has a contour is the Zwölferkogel (Stubai Alps), Zwölferkogel in Austria's Stubai Alps. The distance between the Zugspitze and this contour is ; the Zugspitze is thus the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poike
Poike is one of the three main extinct volcanoes that form Rapa Nui (Easter Island), a Chilean island in the Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is .... At 370 metres above sea level, Poike's peak is the island's second-highest point after the peak of the extinct volcano Terevaka. Poike forms the eastern headland of Rapa Nui. An abrupt cliff known as the "Poike ditch" spans the island at the boundary between the respective lava flows from Poike and Terevaka. As the oldest of the island's three main volcanoes, Poike is the most weathered with relatively stoneless soil. See also * List of volcanoes in Chile * List of volcanoes in Pacific Ocean References * * Routledge, Katherine. 1919. ''The Mystery of Easter Island. The story of an expedition.'' Lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ahu Akivi
Ahu Akivi is a particular sacred place on the Chilean island of Rapa Nui (or Easter Island), looking out towards the Pacific Ocean. The site has seven moai, all of equal shape and size, and is also known as a celestial observatory that was set up around the 16th century. The site is located inland, rather than along the coast. Moai statues were considered by the early people of Rapa Nui as their ancestors or Tupuna that were believed to be the reincarnation of important kings or leaders of their clans. The Moais were erected to protect and bring prosperity to their clan and village. A particular feature of the seven identical moai statues is that they exactly face sunset during the Spring Equinox and have their backs to the sunrise during the Autumn Equinox. Such an astronomically precise feature is seen only at this location on the island. Geography Ahu Akivi, aligned in an east–west direction, is located on the flank of the southern slope of Maunga Terevaka at Rapauni an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanga Roa
Hanga Roa (; ) (Rapanui language: ''Long bay'') is the main town, harbour, and seat of Easter Island, a municipality of Chile. It is located in the southern part of the island's west coast, in the lowlands between the extinct volcanoes of Terevaka and Rano Kau. History ''Hanga Roa'' in the native Rapa Nui language means "wide bay" or "long bay". Upon Chile's claim of the island, the Rapa Nui were forced in Hanga Roa, and the rest of the land was leased to a sheep farm.Annie MurphyFor Chile, Colossal Trouble On Easter Island ''Npr.org'', 9 September 2010 (accessed on 31 May 2019) For much of the twentieth century, the rest of the island was leased to the Compañía Explotadora de la Isla de Pascua (CEDIP) (a subsidiary of Williamson-Balfour Company) and closed to the Rapa Nui. Some disagreements between the government of Chile and the Rapa Nui have led the locals with ancestral roots to "take over" many hotels in the city. For the locals, it is a way to draw the line between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Volcanoes In Chile
The Smithsonian Institution's Global Volcanism Program lists 105 volcanoes in Chile that have been active during the Holocene. using Chile, Chile-Peru, Chile-Bolivia and Chile-Argentina options, retrieved on 10 November 2013 The country's National Geology and Mining Service lists 90 active volcanoes. The volcanoes of the originate from the of the |
List Of Islands By Highest Point
This is a list of islands in the world ordered by their highest point; it lists island, islands with peaks by elevation. At the end of this article continent, continental landmasses are also included for comparison. Island countries and territories listed are those containing the highest point. __TOC__ List of islands with highest point by elevation Other notable island peaks Many of the following islands are selected for inclusion as the main island or having the highest peak in their island nation. The list includes some dependent or semi-dependent island overseas territories with their own ISO 3166-1 country code. The dependencies of Guernsey (Alderney, Sark, Herm) and St. Helena (Tristan da Cunha, Ascension Island) are listed as separate units. Nevis (Saint Kitts-Nevis) is also listed separately. The islands of the former Netherlands Antilles (Aruba, Curaçao, Bonaire, Saint Martin, Sint Eustatius, Saba) have been split up in separate units. The list also includes o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rano Kau
Rano Kau is a tall extinct volcano that forms the southwestern headland of Easter Island, a Chilean island in the Pacific Ocean. It was formed of basaltic lava flows in the Pleistocene with its youngest rocks dated at between 150,000 and 210,000 years ago. The crater Rano Kau has a crater lake which is one of the island's only three natural bodies of fresh water. The lake is located approximately above sea level, but is more than below the highest of the crater's ridges. The volcanic cone is largely surrounded by water, and much of it has been eroded back to form high sea cliffs which at one point (''te kari kari'') have started to bite into the crater wall. The inside walls of the crater are sloped at an angle of between 65° (steepest, near the crest) and 45° (gentlest, at the lake shore). From the ruins of the ceremonial village of Orongo the cliff face drops to the southwest at an angle of 50° to the sea shore some below. On its northern side, the volcano ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shield Volcano
A shield volcano is a type of volcano named for its low profile, resembling a shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano. Repeated eruptions result in the steady accumulation of broad sheets of lava, building up the shield volcano's distinctive form. Shield volcanoes are found wherever fluid, low-silica lava reaches the surface of a rocky planet. However, they are most characteristic of ocean Volcanic island, island volcanism associated with Hotspot (geology), hot spots or with Rift, continental rift volcanism. They include the largest active volcanoes on Earth, such as Mauna Loa. Giant shield volcanoes are found on other planets of the Solar System, including Olympus Mons on Mars and Sapas Mons on Venus. Etymology The term 'shield volcano' is taken from the German term ''Schildvulkan'', coined by the Austrian geologist Eduar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek () 'most' and (; Latinized as ) 'new'. The aridification and cooling trends of the preceding Neogene were continued in the Pleistocene. The climate was strongly variable depending on the glacial cycle, oscillating between cold Glacial period, glacial periods and warmer Interglacial, int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct Volcano
A volcano is commonly defined as a vent or fissure in the Crust (geology), crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and volcanic gas, gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where list of tectonic plates, tectonic plates are divergent boundary, diverging or convergent boundary, converging, and because most of Earth's plate boundaries are underwater, most volcanoes 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 resulting from divergent tectonic activity are usually non-explosive whereas those resulting from convergent tectonic activity cause violent eruptions."Mid-ocean ridge tectonics, volcanism and geomorphology." Geology 26, no. 455 (2001): 458. https://macdonald.faculty.geol.ucsb.edu/papers/Macd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
