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Chigmit Mountains
The Chigmit Mountains are a subrange of the Aleutian Range in the Kenai Peninsula and Lake and Peninsula Boroughs of the U.S. state of Alaska. Location They are located at the northeastern end of the Aleutian range, on the west side of Cook Inlet, roughly 120 miles (200 km) southwest of Anchorage. The closest major towns to the range are Kenai and Homer, across Cook Inlet on the west side of the Kenai Peninsula. To the north, the Chigmits are bordered by the Tordrillo Mountains, and on the northwest, by the Neacola Mountains. Cook Inlet marks the eastern boundary of the range, while on the west, the mountains fade out into the hills and lowlands of Lake Clark National Park and Preserve. On the south and southwest, the Chigmits abut the continuation of the Aleutian Range into the Alaska Peninsula. Geological composition The Chigmits, along with most of the Aleutian Range, are volcanic, and include two prominent stratovolcano A stratovolcano, also known as a compo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Redoubt (Alaska)
Redoubt Volcano, or Mount Redoubt (Denaʼina language, Dena'ina: ''Bentuggezh K’enulgheli''), is an active volcano, active stratovolcano in the largely volcanic Aleutian Range of the U.S. state of Alaska. Located at the head of the Chigmit Mountains subrange in Lake Clark National Park and Preserve, the mountain is just west of Cook Inlet, in the Kenai Peninsula Borough, Alaska, Kenai Peninsula Borough about southwest of Anchorage, Alaska, Anchorage. At , in just over Mount Redoubt attains of prominence over its surrounding terrain. It is the highest summit in the Aleutian Range. In 1976, Redoubt Volcano was designated as a National Natural Landmark by the National Park Service. Active for millennia, Mount Redoubt has erupted four times since it was first observed: in 1902, 1966, 1989 and 2009, with two questionable eruptions in 1881 and 1933. The eruption in 1989 spewed volcanic ash to a height of . It caught KLM Flight 867, a Boeing 747 aircraft, in its plume. After ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neacola Mountains
The Neacola Mountains are the northernmost subrange of the Aleutian Range in the U.S. state of Alaska. The range is named for the Neacola River which bounds it to the north and drains the highest and most rugged peaks of the group. They are bordered on the southeast by the Chigmit Mountains, another subrange of the Aleutian Range, on the northeast by the Tordrillo Mountains, and on the west and southwest by the lakes and lowlands of Lake Clark National Park and Preserve. The highest peak is Mount Neacola (also known as "Neacola Peak"), 9,426 feet (2,873 m) although the name is not officially recognized.The USGS GNIS does not contain an entry for this peak. These mountains have not seen extensive exploration, due to their remoteness, typically poor weather, and lack of truly high peaks. However they are rugged and offer many climbing possibilities of an exploratory nature. Noted climber Fred Beckey visited the range in the early 1970s; in 1991, when he was "spiritual leader" of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Peak (Chigmit Mountains)
Black Peak is a prominent glaciated mountain summit located in Lake Clark National Park and Preserve, in the Chigmit Mountains of the Aleutian Range, in the US state of Alaska. It is the second-highest non-volcanic peak in the Chigmit Mountains, and fourth-highest overall. The mountain is situated west of Cook Inlet, west-southwest of Anchorage, and northeast of Double Peak, which is the nearest higher peak. Although modest in elevation, relief is significant since the mountain rises up from North Fork Big River in about two miles. The mountain's descriptive name was published in 1912 by the United States Coast and Geodetic Survey.Donald J. Orth, ''Dictionary of Alaska Place Names'', 1967, page 141. The months May through June offer the most favorable weather for viewing or climbing the peak. Climate Based on the Köppen climate classification, Black Peak is located in a subarctic climate zone, with long, cold, snowy winters, and cool summers. Winter temperatures can drop b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double Peak (Alaska)
Double Peak is a prominent 6,818 foot (2,078 meter) mountain summit located in Lake Clark National Park and Preserve, in the Chigmit Mountains of the Aleutian Range, in the US state of Alaska. It is the highest non-volcanic peak in the Chigmit Mountains, and third-highest overall. The mountain is situated immediately north of Double Glacier, west-southwest of Anchorage, and north-northeast of Redoubt Volcano, which is the nearest higher peak. Although modest in elevation, relief is significant since the mountain rises up from tidewater at Cook Inlet in about 20 miles, and it ranks 71st in prominence for all peaks in Alaska. Double Peak was considered to be a volcano by the International Association of Volcanology and Chemistry of the Earth's Interior in 1973, but subsequent reconnaissance mapping indicates the peak is likely made of plutonic rocks of Jurassic age. Published in 1912 by the United States Coast and Geodetic Survey, the mountain takes its name from the Double Glac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Redoubt
Redoubt Volcano, or Mount Redoubt ( Dena'ina: ''Bentuggezh K’enulgheli''), is an active stratovolcano in the largely volcanic Aleutian Range of the U.S. state of Alaska. Located at the head of the Chigmit Mountains subrange in Lake Clark National Park and Preserve, the mountain is just west of Cook Inlet, in the Kenai Peninsula Borough about southwest of Anchorage. At , in just over Mount Redoubt attains of prominence over its surrounding terrain. It is the highest summit in the Aleutian Range. In 1976, Redoubt Volcano was designated as a National Natural Landmark by the National Park Service. Active for millennia, Mount Redoubt has erupted four times since it was first observed: in 1902, 1966, 1989 and 2009, with two questionable eruptions in 1881 and 1933. The eruption in 1989 spewed volcanic ash to a height of . It caught KLM Flight 867, a Boeing 747 aircraft, in its plume. After the plane descended 13,000 feet, the pilots restarted the engines and landed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iliamna Volcano
Iliamna Volcano, or Mount Iliamna ( Dena'ina: ''Ch’naqał’in''; Sugpiaq: ''Puyulek''), is a glacier-covered stratovolcano in the largely volcanic Aleutian Range in southwest Alaska. Located in the Chigmit Mountain subrange in Lake Clark National Park and Preserve, the volcano lies approximately southwest of Anchorage on the west side of lower Cook Inlet. It is the 25th most prominent peak in the United States.Alaska Volcano Observatory, Volcano Information - Iliamna Retrieved Dec. 16, 2022. The volcano's glaciers have extensively altered its profile, cutting, deep and creating steep cliffs and cirques. A ridge extends south from the main body of the mountain, with North Twin and South Twin peaks along its length. There is no summit cra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcano
A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and explosive eruptions. Some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and solidifies before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high to intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less viscous mafic magma. Extensive felsic lava flows are uncommon, but can travel as far as 8 km (5 mi). The term ''composite volcano'' is used because strata are usually mixed and uneven instead of neat layers. They are among the most common types of volcanoes; more than 700 stratovolcanoes have erupted lava during the Holocene Epoch (the last 11,700 years), and many ol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic
A volcano is commonly defined as a vent or fissure 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 because most of Earth's plate boundaries are underwater, most volcanoes 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 resulting from divergent tectonic activity are usually non-explosive whereas those resulting from convergent tectonic activity cause violent eruptions."Mid-ocean ridge tectonics, volcanism and geomorphology." Geology 26, no. 455 (2001): 458. https://macdonald.faculty.geol.ucsb.edu/papers/Macdonald%20Mid-Ocean%20Ridge%20Tectonics.pdf Volcanoes can also form where there is stretching a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska Peninsula
The Alaska Peninsula (also called Aleut Peninsula or Aleutian Peninsula, ; Sugpiaq language, Sugpiaq: ''Aluuwiq'', ''Al'uwiq'') is a peninsula extending about to the southwest from the mainland of Alaska and ending in the Aleutian Islands. The peninsula separates the Pacific Ocean from Bristol Bay, an arm of the Bering Sea. In literature (especially Russian), the term ''Alaska Peninsula'' was used to denote the entire northwestern protrusion of the North American continent, or all of what is now the state of Alaska, exclusive of Alaska Panhandle, its panhandle and list of islands of Alaska, islands. The Lake and Peninsula Borough, Alaska, Lake and Peninsula list of boroughs and census areas in Alaska, borough, the Alaskan equivalent of a county (United States), county, is named after the peninsula. The Alaska/Aleutian Peninsula is also grouped into Southwest Alaska. The other largest peninsulas in Alaska include the Kenai Peninsula and Seward Peninsula. Geography The ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Clark National Park And Preserve
Lake Clark National Park and Preserve is a List of national parks of the United States, United States national park and National preserve, preserve in southwest Alaska, about southwest of Anchorage, Alaska, Anchorage. The park was first proclaimed a national monument (United States), national monument in 1978, then established as a national park and preserve in 1980 by the Alaska National Interest Lands Conservation Act. The park includes many streams and lakes vital to the Bristol Bay salmon fishery, including its namesake Lake Clark (Alaska), Lake Clark. A wide variety of recreational activities may be pursued in the park and preserve year-round. The park protects rainforests along the coastline of Cook Inlet, alpine tundra, glaciers, glacial lakes, major salmon-bearing rivers, and two volcanoes, Mount Redoubt and Mount Iliamna. Mount Redoubt is active, erupting in 1989 and 2009. The wide variety of ecosystems in the park mean that virtually all major Alaskan animals, terrestri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tordrillo Mountains
The Tordrillo Mountains are a small mountain range in the Matanuska-Susitna and Kenai Peninsula Boroughs in the southcentral region of the U.S. state of Alaska. They lie approximately west-northwest of Anchorage. The range extends approximately north-south and east-west. The highest point is Mount Torbert (). On a clear day, they are easily visible from Anchorage. The Tordrillos are bordered on the south by the Chigmit Mountains, the northernmost extension of the Aleutian Range. (The Tordrillos are sometimes counted as part of the Aleutian Range, but this is not official usage.) On the west and north they meet the southern tip of the Revelation Mountains, part of the Alaska Range, while on the east they fade into the hills and lowlands of southcentral Alaska. The north side of the range feeds the Skwentna River, and the south drains into Chakachamna Lake and the Chakachatna River. The Tordrillos are primarily a volcanic range, like most of the neighboring Aleutian Range; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleutian Range
The Aleutian Range is a major mountain range located in southwest Alaska. It extends from Chakachamna Lake (80 miles/130 km southwest of Anchorage) to Unimak Island, which is at the tip of the Alaska Peninsula. It includes all of the mountains of the Peninsula. The Aleutian Range is special because of its large number of active volcanoes, which are also part of the larger Aleutian Arc. The mainland part of the range is about 600 miles (1000 km) long. The Aleutian Islands are (geologically) a partially submerged western extension of the range that stretches for another 1,600 km (1000 mi). However the official designation "Aleutian Range" includes only the mainland peaks and the peaks on Unimak Island. The range is almost entirely roadless wilderness. Katmai National Park and Preserve, a large national park within the range, must be reached by boat or plane. The core Aleutian Range can be divided into three mountain groups. Listed from southwest to northeast, they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
