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Mount Harper (New Zealand)
Mount Harper is a deeply eroded Late Proterozoic volcanic complex located north of Dawson City and west of Mount Gibben. Mount Harper is in the Ogilvie Mountains and is the thick remnant of a subaqueous-to-emergent basaltic shield volcano capped by small rhyodacitic and andesitic lava flows. It oversteps the Harper Fault. In 1888, William Olgilvie named the mountain in honor of Arthur Harper, recognized as the first man to enter the Yukon country seeking gold. See also *List of volcanoes in Canada *Volcanism in Canada Volcanism, Volcanic activity is a major part of the geology of Canada and is characterized by many types of volcanic landform, including lava flows, volcanic plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcano ... References External linksMount Harperin the Canadian Mountain Encyclopedia Volcanoes of Yukon One-thousanders of Yukon Proterozoic volcanoes Shield volcanoes of Canada Polygenetic shield volcanoes< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yukon
Yukon (; ; formerly called Yukon Territory and also referred to as the Yukon) is the smallest and westernmost of Canada's three territories. It also is the second-least populated province or territory in Canada, with a population of 43,964 as of March 2022. Whitehorse, the territorial capital, is the largest settlement in any of the three territories. Yukon was split from the North-West Territories in 1898 as the Yukon Territory. The federal government's ''Yukon Act'', which received royal assent on March 27, 2002, established Yukon as the territory's official name, though ''Yukon Territory'' is also still popular in usage and Canada Post continues to use the territory's internationally approved postal abbreviation of ''YT''. In 2021, territorial government policy was changed so that “''The'' Yukon” would be recommended for use in official territorial government materials. Though officially bilingual (English and French), the Yukon government also recognizes First Natio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harper Fault
Harper may refer to: Names * Harper (name), a surname and given name Places ;in Canada *Harper Islands, Nunavut *Harper, Prince Edward Island ;In the United States *Harper, former name of Costa Mesa, California in Orange County *Harper, Illinois *Harper, Indiana * Harper, Iowa *Harper, Kansas *Harper, Kentucky *Harper, Missouri *Harper, Logan County, Ohio *Harper, Ross County, Ohio * Harper, Oregon * Harper, Texas *Harper, Utah *Harper, Washington *Harper, Wyoming ;Elsewhere * Harper, Liberia * Harper River in Canterbury, New Zealand * Harper Adams University, Shropshire, United Kingdom. Court cases * ''Harper'' ''v''. ''Virginia Board of Elections'', 383 U.S. 663 (1966), overruling ''Breedlove'' ''v''. ''Suttles'', 302 U.S. 277 (1937) Other uses * Harper, a harp player * ''Harper'' (film), a 1966 film starring Paul Newman and Lauren Bacall * Harper (publisher), an American publishing house, the imprint of global publisher HarperCollins * Harper College, a community col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proterozoic Volcanoes
The Proterozoic () is a geological eon spanning the time interval from 2500 to 538.8million years ago. It is the most recent part of the Precambrian "supereon". It is also the longest eon of the Earth's geologic time scale, and it is subdivided into three geologic eras (from oldest to youngest): the Paleoproterozoic, Mesoproterozoic, and Neoproterozoic. The Proterozoic covers the time from the appearance of oxygen in Earth's atmosphere to just before the proliferation of complex life (such as trilobites or corals) on the Earth. The name ''Proterozoic'' combines two forms of ultimately Greek origin: meaning 'former, earlier', and , 'of life'. The well-identified events of this eon were the transition to an oxygenated atmosphere during the Paleoproterozoic; the evolution of eukaryotes; several glaciations, which produced the hypothesized Snowball Earth during the Cryogenian Period in the late Neoproterozoic Era; and the Ediacaran Period (635 to 538.8 Ma) which is charact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Yukon
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] |
Volcanism In Canada
Volcanism, Volcanic activity is a major part of the geology of Canada and is characterized by many types of volcanic landform, including lava flows, volcanic plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcanoes, calderas, diatremes, and maars, along with less common volcanic forms such as tuyas and subglacial mounds. Though Canada's volcanic history dates back to the Precambrian eon, at least 3.11 billion years ago, when its part of the North American continent began to form, volcanism continues to occur in Western Canada, Western and Northern Canada in modern times, where it forms part of an encircling chain of volcanoes and frequent earthquakes around the Pacific Ocean called the Pacific Ring of Fire. Because volcanoes in Western and Northern Canada are in relatively remote and sparsely populated areas and their activity is less frequent than with other volcanoes around the Pacific Ocean, Canada is commonly thought to occupy a gap in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Volcanoes In Canada
List of volcanoes in Canada is an incomplete list of volcanoes found in Mainland Canada, in the Canadian islands and in Canadian waters. All but one province, Prince Edward Island, have at least one volcano. Alberta British Columbia New Brunswick Newfoundland and Labrador Northwest Territories Nova Scotia Nunavut Ontario Quebec Saskatchewan Yukon See also * Outline of Canada * Bibliography of Canada * Index of Canada-related articles * Volcanism of Canada ** Volcanism of Northern Canada ** Volcanism of Western Canada ** Volcanism of Eastern Canada ** List of Northern Cordilleran volcanoes * List of mountains in Canada * List of Cascade volcanoes External links Catalogue of Canadian Volcanoes {{Canadian volcanism Canada Volcanoes Volcanoes 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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Harper (trader)
Arthur Harper (1835–1897) was an Irish-born Yukon River prospector, trader, and explorer, recognized as the first man to enter the Yukon country seeking gold. He mined in California in the 1850s, and British Columbia through the 1860s, before taking off for the Yukon in 1871. He reached Fort Yukon in 1873, and ran a store with Jack McQuesten at the Fortymile River. Harper formed a trading partnership with McQuesten and Captain Al Mayo; their company founded Fort Reliance in 1875 and other posts in the Yukon. Harper was known as the best prospector of the trio, and while he did not achieve major success in his pursuit of gold, he sometimes pointed others to finds. He traded and prospected in Alaska until just before his death. Early years Arthur Harper was born in County Antrim, present-day Northern Ireland, in 1835. He was educated in local schools, and survived the Great Famine of the late 1840s. At the age of 20, he left Ireland for California, drawn to prospecting and mining ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Ogilvie (surveyor)
William Ogilvie FRGS (April 7, 1846 in Ottawa – November 13, 1912 in Winnipeg, Manitoba) was a Canadian Dominion land surveyor, explorer and the commissioner of Yukon. He was born on a farm in Gloucester Township, Canada West in an area now known as Glen Ogilvie to James Ogilvie of Belfast Ireland and Margaret Holliday Ogilvie of Peebles, Scotland. Ogilvie articled as a surveyor with Robert Sparks, qualifying to practice as a Provincial Land Surveyor in 1869. He married Sparks' sister Mary, a school teacher, on March 8, 1872. He worked locally as a land surveyor, qualified as a Dominion Land Surveyor in 1872 and was first hired by the Dominion government in 1875. He was responsible for numerous surveys from the 1870s to the 1890s, mainly in the Prairie Provinces. From 1887 to 1889, Ogilvie was involved in George Mercer Dawson's exploration and survey expedition in what later became the Yukon Territory. He surveyed the Chilkoot Pass, the Yukon and Porcupine rivers. Ogilvie estab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andesite
Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust. The name ''andesite'' is derived from the Andes mountain range, where this rock type is found in abundance. It was first applied by Christian Leopold von Buch in 1826. Description Andesite is an aphanitic (fine-grained) igneous rock that is intermediate in its content of silica and low in alkali metals. It has less than 20% quartz and 10% feldspathoid by volume, with at least 65% of the fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ogilvie Mountains
The Ogilvie Mountains are a mountain range in the Yukon Territory of northwestern Canada. Geologically they are part of the Yukon Ranges, in the upper Laramide Belt of the North American Cordillera. Geography The range lies north of Dawson City, and is crossed by the Dempster Highway. The area was first surveyed by William Ogilvie and the range subsequently named after him. ;Sub-ranges *Nahoni Range ;Peaks The best known mountain peaks of the Ogilvie Mountains are located within Tombstone Territorial Park. The highest mountain within the range is Mount Frank Rae, at in elevation. The range's most familiar mountains, with their jagged granite Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies undergro ... peaks, are: * Tombstone Mountain * Mount Monolith References External link ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhyodacite
Rhyodacite is a volcanic rock intermediate in composition between dacite and rhyolite. It is the extrusive equivalent of those plutonic rocks that are intermediate in composition between monzogranite and granodiorite. Rhyodacites form from rapid cooling of lava relatively rich in silica and low in alkali metal oxides. Description Under IUGS guidelines, rhyodacites are not formally defined in either the QAPF classification, used to classify igneous rocks by their mineral content, or the TAS classification, used to classify volcanic rocks chemically. However, the IUGS allows the use of the term to describe rocks close to the boundary between the rhyolite and dacite fields in each classification scheme. Rhyodacite then describes a fine-grained igneous rock containing between 20% and 60% quartz and in which plagioclase makes up about two-thirds of the total feldspar content. Such a rock will contain between 69% and 72% silica by weight. The U.S. Geological Survey defines rhyodacite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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