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Mount Johnson (Alaska)
Mount Johnson is an mountain summit located in the Alaska Range, in Denali National Park and Preserve, in Alaska, United States. It is situated on the west side of the Ruth Gorge, southeast of Denali and south-southwest of The Moose's Tooth. Its nearest higher peak is Mount Wake, to the northwest. Despite its relatively low elevation, it is notable for its north face with over 4,000 feet of vertical sheer granite with climbing routes called the ''Escalator'' and ''Stairway to Heaven''. The first ascent of the peak was made in 1979 by Gary Bocarde, Charlie Head, John Lee, and Jon Thomas via the south ridge. The mountain was named by famed explorer Dr. Frederick Cook who claimed the first ascent of Mount McKinley in 1906, but was later disproved. Climate Based on the Köppen climate classification, Mount Johnson is located in an alpine climate zone with long, cold, snowy winters, and cool summers. Temperatures can drop below −20 °C with wind chill factors below −30 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska Range
The Alaska Range is a relatively narrow, 600-mile-long (950 km) mountain range in the 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 Geographic Namesentry is inconsistent; part of it designates Iliamna Lake as the southwestern end, and part of the entry has the range ending at the Telaquana and Neacola Rivers. Other sources identify Lake Clark, in between those two, as the endpoint. This also means that the status of the Neacola Mountains is unclear: it is usually identified as the northernmost subrange of the Aleutian Range, but it could also be considered the southernmost part of the Alaska Range. to the White River in Canada's Yukon Territory in the southeast. The highest mountain in North America, Denali, is in the Alaska Range. It is part of the American Cordillera. The Alaska range is one of the higher ranges in the world after the Himalayas and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpine Climate
Alpine climate is the typical weather ( climate) for elevations above the tree line, where trees fail to grow due to cold. This climate is also referred to as a mountain climate or highland climate. Definition There are multiple definitions of alpine climate. In the Köppen climate classification, the alpine and mountain climates are part of group ''E'', along with the polar climate, where no month has a mean temperature higher than . According to the Holdridge life zone system, there are two mountain climates which prevent tree growth : a) the alpine climate, which occurs when the mean biotemperature of a location is between . The alpine climate in Holdridge system is roughly equivalent to the warmest tundra climates (ET) in the Köppen system. b) the alvar climate, the coldest mountain climate since the biotemperature is between 0 °C and 1.5 °C (biotemperature can never be below 0 °C). It corresponds more or less to the coldest tundra climates and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains Of Denali National Park And Preserve
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains Of Matanuska-Susitna Borough, Alaska
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokositna Glacier
Tokositna Glacier is a glacier in the Alaska Range of Denali National Park and Preserve in the U.S. state of Alaska. The glacier originates in two major arms on the east side of Mount Hunter, moving east until the main arms join, then turning south. Tokositna Glacier is the source of the Tokositna River. Spelling variants and alternate names include Tokasitna Glacier, Tokichitna Glacier and Tuqashitnu Li'a. Its thickness has been monitored by the National Park Service, which found consistent thinning since the 1990s. See also * List of glaciers A glacier ( ) or () is a persistent body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly defor ... References Glaciers of Matanuska-Susitna Borough, Alaska Glaciers of Denali National Park and Preserve Glaciers of Alaska {{Alaska-glacier-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Grosvenor (Alaska Range)
Mount Grosvenor is an mountain summit located in the Alaska Range, in Denali National Park and Preserve, in Alaska, United States. It is situated on the west side of the Ruth Gorge, northwest of Mount Church and south of Mt. Johnson. Its nearest higher peak is Mount Wake, to the northwest. Despite its relatively low elevation, it is notable for its east face with over 4,000 feet of vertical sheer granite. The mountain was named by famed explorer Dr. Frederick Cook who claimed the first ascent of Mount McKinley in 1906, but was later disproved. This peak's unofficial name honors Gilbert Hovey Grosvenor (1875–1966), President of the National Geographic Society, father of photojournalism, and the first full-time editor of '' National Geographic'' magazine. The first ascent of the peak was made in 1979 by Gary Bocarde, Charlie Head, John Lee, and Jon Thomas.''Appalachia'', Summer/Fall 2005, Volumes 56-58, page 111 Climate Based on the Köppen climate classification, Mount Gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Church (Alaska)
Mount Church is a mountain in the Alaska Range, in Denali National Park and Preserve, overlooking Ruth Glacier. It is situated on the west side of the Ruth Gorge and southeast of Mount Grosvenor, which is the nearest higher neighbor. The mountain was named by famed explorer Dr. Frederick Cook who claimed the first ascent of Mount McKinley in 1906, but was later disproved. Climate Based on the Köppen climate classification, Mount Church is located in a subarctic climate zone with long, cold, snowy winters, and cool summers. Temperatures can drop below −20 °C with wind chill factors below −30 °C. The months May through June offer the most favorable weather for climbing or viewing. See also *Mountain peaks of Alaska This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a susexxleast of topographic prominence. All summits i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Tower (Alaska)
London Tower is a mountain summit located in the Alaska Range, in Denali National Park and Preserve, in Alaska, United States. It is situated on the east side of the Ruth Gorge, southeast of Denali and south of The Moose's Tooth. Mount Bradley rises directly across The Great Gorge to the west. Despite its relatively low elevation, it is notable for its west face with over 3,000 feet of vertical granite. See also *Mountain peaks of Alaska This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a susexxleast of topographic prominence. All summits i ... Gallery File:London Tower and Peak 7979.jpg, London Tower (center) and Peak 7979 (upper right) File:London Tower Alaska Range.jpg, London Tower File:London Tower, AK.jpg References {{reflist External links * NOAA weatherTalkeetna* Localized weatherMountain Forecast* Flight through 747 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Bradley (Alaska)
Mount Bradley is a mountain summit located in the Alaska Range, in Denali National Park and Preserve, in Alaska, United States. It is situated on the west side of the Ruth Gorge, southeast of Denali and southwest of The Moose's Tooth. Its nearest higher peak is Mount Dickey, to the north, Mount Wake lies to the south, and London Tower rises directly east on the opposite side of The Great Gorge. Despite its relatively low elevation, it is notable for its north face with nearly 5,000 feet of vertical sheer granite. The mountain was named by famed explorer Dr. Frederick Cook for John R. Bradley, a wealthy casino owner from Florida and one of Cook's financial sponsors. Climate Based on the Köppen climate classification, Mount Bradley is located in a subarctic climate zone with long, cold, snowy winters, and cool summers. Temperatures can drop below −20 °F with wind chill factors below −30 °F. The months May through June offer the most favorable weather for viewing and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Alaska
The geology of Alaska includes Precambrian igneous and metamorphic rocks formed in offshore terranes and added to the western margin of North America from the Paleozoic through modern times. The region was submerged for much of the Paleozoic and Mesozoic and formed extensive oil and gas reserves due to tectonic activity in the Arctic Ocean. Alaska was largely ice free during the Pleistocene, allowing humans to migrate into the Americas. Geologic History, Stratigraphy & Tectonics Compared with other areas of the North American continent, Alaska formed in the recent geologic past. Until 200 million years ago, western North America terminated at the Rocky Mountains, 120 miles further inland than the current shoreline, until the addition of the Yukon-Tanana Terrane. The Birch Creek Schist is the oldest rock in Alaska's interior and forms the core of the Yukon-Tanana Terrane with muscovite- quartz schist, mica quartzite and graphite schist. This intensely folded and rock unit ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Peaks Of Alaska
This article comprises three sortable tables of major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a susexxleast of topographic prominence. All summits in this article have at least 500 meters of topographic prominence. An ultra-prominent summit is a summit with at least of topographic prominence. of the U.S. State of Alaska. The summit of a mountain or hill may be measured in three principal ways: #The topographic elevation of a summit measures the height of the summit above a geodetic sea level.If the elevation or prominence of a summit is calculated as a range of values, the arithmetic mean is shown. The first table below ranks the 100 highest major summits of Alaska by elevation. #The topographic prominence of a summit is a measure of how high the summit rises above its surroundings.The topographic prominence of a summit is the topographic elevation difference between the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
