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Mount Margaret (Alaska)
Mount Margaret, also known as Primrose Ridge, is a summit in Alaska, United States. Description Mount Margaret is located in the Alaska Range and in Denali National Park and Preserve. It is situated west of Mount Healy at miles 14–20 of the Park Road which traverses the mountain's southern slope. Precipitation runoff from the mountain drains west into the Sanctuary River and east into Savage River, which are both tributaries of the Teklanika River. Topographic relief is modest as the summit rises above the Savage River Canyon in two miles (3.2 km). Climate Based on the Köppen climate classification, Mount Margaret is located in a tundra climate zone with long, cold, snowy winters, and mild summers. Winter temperatures can drop below −20 °F with wind chill factors below −30 °F. The months May through June offer the most favorable weather for climbing or viewing. Etymology The mountain's toponym has been officially adopted by the United States Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margaret Murie
Margaret Thomas "Mardy" Murie (August 18, 1902 – October 19, 2003) was a naturalist, writer, adventurer, and conservationist. Dubbed the "Grandmother of the Conservation Movement" by both the Sierra Club and the Wilderness Society, she helped in the passage of the Wilderness Act, and was instrumental in creating the Arctic National Wildlife Refuge. She was the recipient of the Audubon Medal, the John Muir Award, and the Presidential Medal of Freedom—the highest civilian honor awarded by the United States. Early life Born Margaret Thomas on August 18, 1902 in Seattle, Washington, Murie moved to Fairbanks, Alaska, with her family when she was nine years old. She attended Reed College in Oregon for two years before transferring to Simmons College in Massachusetts for a year, then transferred to and became the first woman to graduate from the Alaska Agricultural College and School of Mines (now the University of Alaska Fairbanks); she graduated in 1924 with a degree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, the climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' i ... [...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] |
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] |
List Of Mountains And Mountain Ranges Of Denali National Park And Preserve
Mountains in Denali National Park and Preserve are part of the Alaska Range, with several subsidiary ranges included within the overall Alaska Range. Denali (also known as Mount McKinley), is the highest peak in the park and the highest peak in North America at The names listed here reflect the official names in the USGS U.S. Board on Geographic Names database. They in most cases exclude subsidiary peaks of larger mountains — McKinley alone has dozens of prominent points above 15,000 feet. The final version of this list will include all named peaks in the park and preserve above and a selection of prominent named peaks of lesser height. Central Alaska Range The central Alaska Range is dominated by the enormous Denali and its complex of subsidiary summits, spurs and buttresses. Of the other central Alaska Range summits, only Mount Foraker substantially exceeds , and most prominent peaks are in the – range. * Denali - ; * Kahiltna Dome - ; * Kahiltna Peaks - ; * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Board On Geographic Names
The United States Board on Geographic Names (BGN) is a federal body operating under the United States Secretary of the Interior. The purpose of the board is to establish and maintain uniform usage of geographic names throughout the federal government of the United States. History On January 8, 1890, Thomas Corwin Mendenhall, superintendent of the US Coast and Geodetic Survey Office, wrote to 10 noted geographers "to suggest the organization of a Board made up of representatives from the different Government services interested, to which may be referred any disputed question of geographical orthography." President Benjamin Harrison signed executive order 28 on September 4, 1890, establishing the ''Board on Geographical Names''. "To this Board shall be referred all unsettled questions concerning geographic names. The decisions of the Board are to be accepted y federal departmentsas the standard authority for such matters." The board was given authority to resolve all unsettled q ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tundra Climate
The tundra climate is a polar climate sub-type located in high latitudes and high mountains. undra climate https://www.britannica.com/science/tundra-climateThe Editors of Encyclopaedia Britannica, 2019 It is classified as ET according to Köppen climate classification. It is a climate which at least one month has an average temperature high enough to melt snow (), but no month with an average temperature in excess of . Despite the potential diversity of climates in the ''ET'' category involving precipitation, extreme temperatures, and relative wet and dry seasons, this category is rarely subdivided. Rainfall and snowfall are generally slight due to the low vapor pressure of water in the chilly atmosphere, but as a rule potential evapotranspiration is extremely low, allowing soggy terrain of swamps and bogs even in places that get precipitation typical of deserts of lower and middle latitudes. The amount of native tundra biomass depends more on the local temperature than the amou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topographic Relief
Terrain or relief (also topographical relief) involves the vertical and horizontal dimensions of land surface. The term bathymetry is used to describe underwater relief, while hypsometry studies terrain relative to sea level. The Latin word (the root of ''terrain'') means "earth." In physical geography, terrain is the lay of the land. This is usually expressed in terms of the elevation, slope, and orientation of terrain features. Terrain affects surface water flow and distribution. Over a large area, it can affect weather and climate patterns. Importance The understanding of terrain is critical for many reasons: * The terrain of a region largely determines its suitability for human settlement: flatter alluvial plains tend to have better farming soils than steeper, rockier uplands. * In terms of environmental quality, agriculture, hydrology and other interdisciplinary sciences; understanding the terrain of an area assists the understanding of watershed boundaries, ... [...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] |
Teklanika River
The Teklanika River (Lower Tanana: ''Tach'edhaneek'a'') is a tributary of the Nenana River in the U.S. state of Alaska. The Nenana is a tributary of the Tanana River, which is part of the Yukon River drainage in the central interior region of the state. Flowing northward from headwaters at the Cantwell Glacier in the Alaska Range, the Teklanika drains an area widely visited by tourists to Denali National Park and Preserve. The park's only road crosses the river at milepost 31 and a National Park campground is located on its eastern bank at milepost 29. On its course, the river travels north from the core Alaska Range as a braided river, becoming rapid and narrow as it traverses through the Primrose Ridge, braiding again through the Stampede Trail valley, narrowing again through the Tekla Ridge before ultimately meandering through a complex series of oxbow turns and lakes across the southern Tanana River valley. The river is crossed by the Denali Park Road and the Stampede Tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Healy
Mount Healy, also known in Denaʼina language as ''Dlel Neelghu Nodaadlghunee'' (meaning "mountains that are joined together"), is a 5,716-foot (1,742 meter) elevation mountain summit located in the Alaska Range, in Denali National Park and Preserve, in Alaska, United States. It is situated immediately northwest of park headquarters and south of Healy. The George Parks Highway and Alaska Railroad traverse the eastern base of this mountain as each passes through the Nenana River Gorge. Mount Healy's nearest neighbor, Sugar Loaf Mountain, is set to the east across the gorge, and the nearest higher peak is Fang Mountain, to the south-southwest. Mount Healy is a nine-mile-long, east–west trending ridge system of mostly loose rock with jagged peaks and spires. Vegetation ranges from boreal forest at the base all the way up to barren alpine ridges and snowfields at the top. This area is very popular for day hikes due to its close proximity to the park entrance. This mountain and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
