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Rano Kau
Rano Kau is a tall dormant 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 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Katherine Routledge
Katherine Maria Routledge (), née Pease (11 August 1866 – 13 December 1935), was an English archaeologist and anthropologist who, in 1914, initiated and carried out much of the first true survey of Easter Island. She was the second child of Kate and Gurney Pease, and was born into a wealthy Quaker family in Darlington, County Durham, northern England. She graduated from Somerville Hall (now Somerville College, Oxford), with Honours in Modern History in 1895, and for a while taught courses through the Extension Division and at Darlington Training College. After the Second Boer War, she traveled to South Africa with a committee to investigate the resettlement of single working women from England to South Africa. In 1906 she married William Scoresby Routledge. The couple went to live among the Kikuyu people of what was then British East Africa, and in 1910 jointly published a book of their research entitled ''With A Prehistoric People''. Easter Island In 1910 the Routledges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Easter Island
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] |
Pleistocene Volcanoes
The Pleistocene ( , often referred to as the ''Ice age'') is the geological epoch that lasted from about 2,580,000 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 grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing a faunal interchange between the two reg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct Volcanoes
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 sli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sirolimus
Sirolimus, also known as rapamycin and sold under the brand name Rapamune among others, is a macrolide compound that is used to coat coronary stents, prevent organ transplant rejection, treat a rare lung disease called lymphangioleiomyomatosis, and treat perivascular epithelioid cell tumor ( PEComa). It has immunosuppressant functions in humans and is especially useful in preventing the rejection of kidney transplants. It is a mechanistic target of rapamycin kinase (mTOR) inhibitor that inhibits activation of T cells and B cells by reducing their sensitivity to interleukin-2 (IL-2). It is produced by the bacterium ''Streptomyces hygroscopicus'' and was isolated for the first time in 1972, from samples of ''Streptomyces hygroscopicus'' found on Easter Island. The compound was originally named rapamycin after the native name of the island, Rapa Nui. Sirolimus was initially developed as an antifungal agent. However, this use was abandoned when it was discovered to have potent im ... [...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 lists 90 active volcanoes. The volcanoes of the originate from the of the |
Pano Rano Kao
Pano may refer to: Pano ancient empory somaly Culture and language * Páno, one of the family of Panoan languages, within the wider group of Pano-Tacanan languages spoken in South America * Pano people or Tsimané people, Bolivia * Paño, a form of prison artwork from Chicano people in the United States * Pano (caste), a Dalit scheduled caste * Pano, a 2021 song by Zack Tabudlo People ;Given name * Pano Angelov Apostolov, known also as Karabadzhakov, Bulgarian revolutionary, a worker of the Internal Macedonian-Adrianople Revolutionary Organization * Pano Capéronis (born 1947), Swiss freestyle swimmer ;Surname *Alexa Pano Alexa Pano (born August 20, 2004) is an American professional golfer. She was featured in the 2013 documentary film ''The Short Game''. Early life Pano was born in Westborough, Massachusetts, and her parents divorced when she was a baby. She has ... (born 2004), American amateur golfer. * Antoine Pano (born 1952), Lebanese politician and retired general ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toromiro
''Sophora toromiro'', commonly known as toromiro, is a species of flowering tree in the legume family, Fabaceae, that is endemic to Easter Island. History Heavy deforestation had eliminated most of the island's forests by the first half of the 17th century, and the once common toromiro became rare and ultimately extinct in the wild in the 1960s. Local tradition has it that the rongorongo tablets of Easter Island are made of toromiro. However, all tablets of native wood tested by modern methods have turned out to be ''Thespesia populnea'', known as ''miro'' or ''milo'' in some Polynesian languages. David Attenborough describes the timber from which a small wooden male sculpture in his possession is made, having been identified by Kew Gardens as ''Sophora toromiro''. Conservation The tree is being reintroduced to the island in a scientific project partly led jointly by the Royal Botanic Gardens, Kew and the Gothenburg Botanical Garden, where the only remaining plants of this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pumice
Pumice (), called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough-textured volcanic glass, which may or may not contain crystals. It is typically light-colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls, and being dark colored and denser.Jackson, J.A., J. Mehl, and K. Neuendorf (2005) ''Glossary of Geology'' American Geological Institute, Alexandria, Virginia. 800 pp. McPhie, J., M. Doyle, and R. Allen (1993) ''Volcanic Textures A guide to the interpretation of textures in volcanic rocks'' Centre for Ore Deposit and Exploration Studies, University of Tasmania, Hobart, Tasmania..198 pp. Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano. The unusual foamy configuration of pumice happens because of simultaneous rapid cooling and rapid depressurization. The depressurization creates bubbles by lowering the solu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obsidian
Obsidian () is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolitic lava flows known as obsidian flows. These flows have a high content of silica, granting them a high viscosity. The high viscosity inhibits diffusion of atoms through the lava, which inhibits the first step ( nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava. Obsidian is hard, brittle, and amorphous; it therefore fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as surgical scalpel blades. Origin and properties The '' Natural History'' by the Roman writer Pliny the Elder inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basalt
Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. Basalt is also an important rock type on other planetary bodies in the Solar System. For example, the bulk of the plains of Venus, which cover ~80% of the surface, are basaltic; the lunar maria are plains of flood-basaltic lava flows; and basalt is a common rock on the surface of Mars. Molten basalt lava has a low viscosity due to its relatively low silica content (between 45% and 52%), resulting in rapidly moving lava flows that can spread over great areas before cooling and solidifying. Flood basalts are t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
