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Mount Logan
Mount Logan ( ) is the highest mountain in Canada and the second-highest peak in North America after Denali (McKinley). The mountain was named after Sir William Edmond Logan, a Canadian geologist and founder of the Geological Survey of Canada (GSC). Mount Logan is located within Kluane National Park and Reserve in southwestern Yukon, less than north of the Yukon–Alaska border. Mount Logan is the source of the Hubbard and Logan glaciers. Although many shield volcanoes are much larger in size and mass, Mount Logan is believed to have the largest base circumference of any non-volcanic mountain on Earth, including a massif with eleven peaks over . Mount Logan is the 6th most topographically prominent peak on Earth. Due to active tectonic uplifting, Mount Logan is still rising in height (approximately per year). Before 1992, the exact elevation of Mount Logan was unknown and measurements ranged from . In May 1992, a GSC expedition climbed Mount Logan and fixed the current h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Elias Mountains
The Saint Elias Mountains () are a subgroup of the Pacific Coast Ranges, located in southeastern Alaska in the United States, Southwestern Yukon and the very far northwestern part of British Columbia in Canada. The range spans Wrangell-St. Elias National Park and Preserve in the United States and Kluane National Park and Reserve in Canada and includes all of Glacier Bay National Park in Alaska. In Alaska, the range includes parts of the city/borough of Yakutat and the Hoonah-Angoon and Valdez-Cordova census areas. This mountain range is named after Mount Saint Elias, which in turn was named in 1741 by the Danish-born Russian explorer Vitus Bering. Geology The Saint Elias Mountains form the highest coastal mountain range on Earth. It formed due to the subduction of the Yakutat microplate underneath the North American Plate. The Yakutat microplate is a wedge shaped oceanic plateau with a thickness of . Similar to the adjacent Pacific Plate, which has a crustal thickness of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kluane National Park And Reserve
Kluane National Park and Reserve (; ) are two protected areas in the southwest corner of the Provinces and territories of Canada, territory of Yukon. The National Park Reserve was set aside in 1972 to become a national park, pending settlement of First Nations in Canada, First Nations land claims. It covered an area of . When agreement was reached with the Champagne and Aishihik First Nations over an eastern portion of the Reserve, that part—about —became a national park in 1993, and is a unit of the national park system administered co-operatively with Parks Canada. The larger western section remains a Reserve, awaiting a final land claim settlement with the Kluane First Nation. The park borders British Columbia to the south, while the Reserve borders both British Columbia to the south, and the United States (Alaska) to the south and west. The Reserve includes the highest mountain in Canada, Mount Logan () of the Saint Elias Mountains. Mountains and glaciers, including Donj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Saint Elias
Mount Saint Elias (Was'eitushaa also designated Boundary Peak 186), the second-highest mountain in both Canada and the United States, stands on the Yukon and Alaska border about southwest of Mount Logan, the highest mountain in Canada. The Canadian side of Mount Saint Elias forms part of Kluane National Park and Reserve, while the U.S. side of the mountain is located within Wrangell-St. Elias National Park and Preserve. History and features The name of the mountain in Tlingit, ''Yasʼéitʼaa Shaa'' or ''Was'eitushaa'', means "mountain behind Icy Bay"; the Yakutat Tlingit occasionally call it ''Shaa Tlein'' "Big Mountain". It is one of the most important crests of the Kwaashkʼiḵwáan clan, who used it as a guide during their journey down the Copper River. Mount Fairweather at the apex of the British Columbia and Alaska borders at the head of the Alaska Panhandle is known as ''Tsalx̱aan''; legend states that this mountain and ''Yasʼéitʼaa Shaa'' (Mt. St. Elias) or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israel Russell
Israel Cook Russell, LL.D. (December 10, 1852 – May 1, 1906) was an American geologist and geographer known for his seminal work on paleolakes of the Great Basin and exploration of Alaska in the late 19th century. Early life and education Russell was born at Garrattsville, New York, on December 10, 1852. He received B.S. and C.E. degrees in 1872 from the University of the City of New York (now New York University), and later studied at the School of Mines, Columbia College. Career In 1874 he accompanied one of the parties sent out by the United States government to observe the transit of Venus, and was stationed at Queenstown, New Zealand. On his return in 1875 he was appointed assistant in geology at the School of mines, and in 1878 he became assistant geologist on the United States geological and geographical survey west of the 100th meridian. In 1880, he became a member of the United States Geological Survey (USGS). Between 1881 and 1885 he worked at Mono Lake in east-ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yakutat Bay
Yakutat Bay ( Lingít: ''Yaakwdáat G̱eeyí'') is a bay in the U.S. state of Alaska, extending southwest from Disenchantment Bay to the Gulf of Alaska. "Yakutat" is a Tlingit name reported as "Jacootat" and "Yacootat" by Yuri Lisyansky in 1805. Yakutat Bay was the epicenter of two major earthquakes on September 10, 1899, a magnitude 7.4 foreshock and a magnitude 8.0 main shock, 37 minutes apart. The Shelikhov-Golikov company (precursor of the Russian-American Company), under the management of Alexander Andreyevich Baranov, founded a settlement in Yakutat Bay in 1795. It was known as New Russia, Yakutat Colony, or Slavorossiya. Other names Yakutat Bay has had various names. *James Cook called it "Bering Bay".Khlebnikov, K.T., 1973, Baranov, Chief Manager of the Russian Colonies in America, Kingston: The Limestone Press, * Jean-François de La Pérouse, who visited it in 1786, named it "Baie de Monti" for one of his officers. *The same year, Captain Nathaniel Por ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mentasta Pass
Mentasta Pass is a major mountain pass in Alaska, separating the Alaska Range on the west from the Mentasta Mountains on the east. Alaska Route 1 (the Glenn Highway) runs through the pass, connecting the Copper River Valley with the Alaska Highway. Mentasta Pass is notable as the key col between Mount Logan (highpoint of Canada and the Saint Elias Mountains) and Denali (highpoint of the United States and the Alaska Range The Alaska Range is a relatively narrow, mountain range in the Southcentral Alaska, southcentral region of the U.S. state of Alaska, from Lake Clark at its southwest endSources differ as to the exact delineation of the Alaska Range. ThBoard on G ...). Because of its relatively low elevation, Mount Logan's prominence is the 6th highest in the world, despite being relatively close to Denali. References Mountain passes of Alaska Landforms of Copper River Census Area, Alaska {{CopperRiverAK-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topographic Prominence
In topography, prominence or relative height (also referred to as autonomous height, and shoulder drop in US English, and drop in British English) measures the height of a mountain or hill's summit relative to the lowest contour line encircling it but containing no higher summit within it. It is a measure of the independence of a summit. The key col ("saddle") around the peak is a unique point on this contour line and the ''parent peak'' (if any) is some higher mountain, selected according to various criteria. Definitions The prominence of a peak is the least drop in height necessary in order to get from the summit to any higher terrain. This can be calculated for a given peak in the following manner: for every path connecting the peak to higher terrain, find the lowest point on the path; the ''key col'' (or ''highest saddle (landform), saddle'', or ''linking col'', or ''link'') is defined as the highest of these points, along all connecting paths; the prominence is the differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Cap
In glaciology, an ice cap is a mass of ice that covers less than of land area (usually covering a highland area). Larger ice masses covering more than are termed ice sheets. Description By definition, ice caps are not constrained by topographical features (i.e., they must lie over the top of mountains). By contrast, ice masses of similar size that ''are'' constrained by topographical features are known as ice fields. The ''dome'' of an ice cap is usually centred on the highest point of a massif. Ice flows away from this high point (the ice divide) towards the ice cap's periphery. Ice caps significantly affect the geomorphology of the area they occupy. Plastic moulding, gouging and other glacial erosional features become present upon the glacier's retreat. Many lakes, such as the Great Lakes in North America, as well as numerous valleys have been formed by glacial action over hundreds of thousands of years. The Antarctic and Greenland contain 99% of the ice volume on earth, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Positioning System
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta 31. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephone or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls, and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. Overview The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was launched in 1978 an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectonic Uplift
Tectonic uplift is the orogeny, geologic uplift of Earth#Surface, Earth's surface that is attributed to plate tectonics. While Isostasy, isostatic response is important, an increase in the mean elevation of a region can only occur in response to tectonic processes of Thrust tectonics, crustal thickening (such as Mountain formation, mountain building events), changes in the density distribution of the crust and underlying Mantle (geology), mantle, and flexural support due to the bending of rigid lithosphere. Tectonic uplift results in denudation (processes that wear away the earth's surface) by raising buried rocks closer to the surface. This process can redistribute large loads from an elevated region to a topographically lower area as well – thus promoting an isostatic response in the region of denudation (which can cause local bedrock uplift). The timing, magnitude, and rate of denudation can be estimated by geologists using pressure-temperature studies. Crustal thickening C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massif
A massif () is a principal mountain mass, such as a compact portion of a mountain range, containing one or more summits (e.g. France's Massif Central). In mountaineering literature, ''massif'' is frequently used to denote the main mass of an individual mountain. As a purely scientific term in geology, however, a "massif" is separately and more specifically defined as a section of a planet's crust (geology), crust that is demarcated by geologic fault, faults or lithospheric flexure, flexures. In the plate tectonics, movement of the crust, a massif tends to retain its internal structure while being displaced as a whole. A massif is a smaller structural unit than a tectonic plate and is considered the fourth-largest driving force in geomorphology. The word "massif" originates from French (in which the word also means "massive"), where it is used to refer to a large mountain mass or compact group of connected mountains forming an independent portion of a range. The Cydonia (regi ... [...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] |
