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Boston Glacier
Boston Glacier is located in a large cirque below several mountain peaks in North Cascades National Park in the U.S. state of Washington. Approximately long but nearly wide, it is the largest glacier in North Cascades National Park. Extending in an arc from the north of Forbidden Peak, it is flanked by Boston Peak to the southwest and Buckner Mountain at its eastern margin, between which it lies below the arête known as Ripsaw Ridge. Another arête extending between Boston Peak, Sharkfin Tower, Forbidden Peak and further north separate Boston Glacier from the nearly adjoining Quien Sabe and Forbidden Glaciers. Boston Glacier has been in an overall state of retreat since the end of the Little Ice Age around the year 1850. A moderate advance occurred between 1950 and the mid-1970s; however, the retreat resumed and between 1972 and 2006 its terminus retreated . See also *List of glaciers in the United States This is a list of glaciers existing in the United States, currentl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Cascades National Park
North Cascades National Park is an American national park in the state of Washington. At more than , it is the largest of the three National Park Service units that comprise the North Cascades National Park Complex. North Cascades National Park consists of a northern and southern section, bisected by the Skagit River that flows through the reservoirs of Ross Lake National Recreation Area. Lake Chelan National Recreation Area lies on the southern border of the south unit of the park. In addition to the two national recreation areas, other protected lands including several national forests and wilderness areas, as well as Canadian provincial parks in British Columbia, nearly surround the park. North Cascades National Park features the rugged mountain peaks of the North Cascades Range, the most expansive glacial system in the contiguous United States, the headwaters of numerous waterways, and vast forests with the highest degree of flora biodiversity of any American nationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skagit County, Washington
Skagit County is a county in the U.S. state of Washington. As of the 2020 census, the population was 129,523. The county seat and largest city is Mount Vernon. The county was formed in 1883 from Whatcom County and is named for the Skagit Indian tribe, which has been indigenous to the area prior to European-American settlement. Skagit County comprises the Mount Vernon-Anacortes, WA Metropolitan Statistical Area, and is included in the Seattle- Tacoma, WA Combined Statistical Area. It is located in the Puget Sound region. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (9.8%) is water. It is noted for its broad, fertile valley of the Skagit River, a center for cultivation of tulips and strawberries. Geographic features * Allan Island * Burrows Island * Cascade Mountains * Cypress Island *Fir Island *Fidalgo Island * Guemes Island * Hart Island *Hope Island * Kiket Island *Pass Island * Samish Island * Sau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five major unincorporated territories, nine United States Minor Outlying Islands, Minor Outlying Islands, and 326 Indian reservations. The United States is also in Compact of Free Association, free association with three Oceania, Pacific Island Sovereign state, sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Palau, Republic of Palau. It is the world's List of countries and dependencies by area, third-largest country by both land and total area. It shares land borders Canada–United States border, with Canada to its north and Mexico–United States border, with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the List of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington (state)
Washington (), officially the State of Washington, is a state in the Pacific Northwest region of the Western United States. Named for George Washington—the first U.S. president—the state was formed from the western part of the Washington Territory, which was ceded by the British Empire in 1846, by the Oregon Treaty in the settlement of the Oregon boundary dispute. The state is bordered on the west by the Pacific Ocean, Oregon to the south, Idaho to the east, and the Canadian province of British Columbia to the north. It was admitted to the Union as the 42nd state in 1889. Olympia is the state capital; the state's largest city is Seattle. Washington is often referred to as Washington state to distinguish it from the nation's capital, Washington, D.C. Washington is the 18th-largest state, with an area of , and the 13th-most populous state, with more than 7.7 million people. The majority of Washington's residents live in the Seattle metropolitan area, the center o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forbidden Peak
Forbidden Peak is an glacial horn located in North Cascades National Park, in Skagit County of Washington state. It is part of the North Cascades and is located near Cascade Pass. Forbidden Peak features a rock climbing route named '' West Ridge'' route which is featured in ''Fifty Classic Climbs of North America''. The peak was first climbed by a party consisting of Fred Beckey, his brother Helmy Beckey, Jim Crooks, Lloyd Anderson and Dave Lind in 1940.Beckey, Fred. Challenge of the North Cascades. Climate Forbidden Peak is located in the marine west coast climate zone of western North America. Beckey, p. 15 Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range, causing them to drop their moisture in the form of rain or snowfall onto the Cascades. As a result, the west side of the North Cascades experiences high precipitation, especi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boston Peak
Boston Peak is a tall peak in the North Cascades in the U.S. state of Washington and within North Cascades National Park. At in elevation it is the 26th highest peak in Washington. Its nearest higher neighbor is Buckner Mountain, to the east. Description Boston Peak is located just north of the border between Chelan and Skagit counties. It is connected to Buckner Mountain, to the east by the sharp arête of Ripsaw Ridge, which follows the county line. Sahale Peak is located directly south of Boston Peak, connected by a short ridge. A longer ridge to the northwest connects Boston Peak with Forbidden Peak and Sharkfin Tower. The north slopes of Boston Peak and Ripsaw Ridge are covered by Boston Glacier, the largest glacier of the North Cascades. The west side of Boston Peak is covered by Quien Sabe Glacier. Davenport Glacier occupies the southeast side of Boston Peak. To the east of the high summits of Forbidden Peak, Boston Peak, and Sahale Mountain the land slopes down i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buckner Mountain
Buckner Mountain (sometimes called Mount Buckner) is a tall peak in the North Cascades of Washington state and in the Stephen Mather Wilderness of North Cascades National Park. At in elevation it is the highest in Skagit County and one of about ten of Washington's non-volcanic peaks above 9,000 feet high. It is ranked as the 14th highest peak in the state, and the third highest peak in North Cascades National Park. Description The mountain has two summits of nearly the same elevation, separated by a ridgeline of a few hundred feet. Sources differ over the exact height of the southwestern summit. The current United States Geological Survey quadrangle shows the southwest summit to have an elevation between 9080 and 9119 feet. According to Peakbagger.com the southwestern peak is the higher one, at , based on Edward Earl's pixel analysis of the height of the peak as derived from a digital photograph. The broader northeastern peak is agreed to be . Noted climber Fred Beckey also cla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arête
An arête ( ) is a narrow ridge of rock which separates two valleys. It is typically formed when two glaciers erode parallel U-shaped valleys. Arêtes can also form when two glacial cirques erode headwards towards one another, although frequently this results in a saddle-shaped pass, called a col. The edge is then sharpened by freeze-thaw weathering, and the slope on either side of the arête steepened through mass wasting events and the erosion of exposed, unstable rock. The word ''arête'' () is actually French for "edge" or "ridge"; similar features in the Alps are often described with the German equivalent term ''Grat''. Where three or more cirques meet, a pyramidal peak is created. Cleaver A ''cleaver'' is a type of arête that separates a unified flow of glacial ice from its uphill side into two glaciers flanking, and flowing parallel to, the ridge. ''Cleaver'' gets its name from the way it resembles a meat cleaver slicing meat into two parts. A cleaver may be t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharkfin Tower
Sharkfin Tower is an summit located in North Cascades National Park, in Skagit County of Washington state. It is set in the scenic North Cascades, which is a sub-range of the Cascade Range. The peak is situated midway on the high ridge which connects Forbidden Peak with Boston Peak. The Quien Sabe Glacier lies below its southern cliffs, and the immense Boston Glacier spreads out below the north aspect. Surface runoff from Sharkfin Tower drains into the Cascade River and Thunder Creek, both of which are tributaries of the Skagit River. Climbing Many climbers consider Sharkfin Tower as having some of the best granite in the state of Washington. Two popular established rock climbing routes are the Southeast Ridge ( YDS 5) first climbed in August 1947, and the Southeast Face (YDS 5.10), first climbed by Jim Nelson, Jim Martin, Kit Lewis, Bill Liddell, and Dave Bale in September 1990.Selected Climbs in the Cascades, Volume 1, 2nd Ed., Jim Nelson and Peter Potterfield, page 192, The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quien Sabe Glacier
Quien Sabe Glacier is a glacier located on the west slopes of Boston Peak, North Cascades National Park in the U.S. state of Washington. Quien Sabe Glacier retreated 1200 meters from its Little Ice Age maximum in approximately 1850 to 1950. The glacier then advanced 55 meters between 1955 and 1975. It then started to retreat again and has retreated 200 meters from its largest extent in the 1970s to 2010. The glacier is approximately in length, in width at its terminus and descends from . The glacier is separated by ridges from Sahale Glacier to the south and the much larger Boston Glacier to the north. See also *List of glaciers in the United States This is a list of glaciers existing in the United States, currently or in recent centuries. These glaciers are located in nine states, all in the Rocky Mountains or farther west. The southernmost named glacier among them is the Lilliput Glacier ... References Glaciers of the North Cascades Glaciers of Skagit County, Washi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forbidden Glacier
Forbidden Glacier is on the north slopes of Forbidden Peak, North Cascades National Park in the U.S. state of Washington. The glacier is approximately in length, in width at its terminus and descends from . The glacier is separated by an arête from Boston Glacier to the east and south. Meltwaters from Forbidden Glacier flow into Moraine Lake. See also *List of glaciers in the United States This is a list of glaciers existing in the United States, currently or in recent centuries. These glaciers are located in nine states, all in the Rocky Mountains or farther west. The southernmost named glacier among them is the Lilliput Glacier ... References Glaciers of the North Cascades Glaciers of Skagit County, Washington Glaciers of Washington (state) {{Washington-glacier-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Little Ice Age
The Little Ice Age (LIA) was a period of regional cooling, particularly pronounced in the North Atlantic region. It was not a true ice age of global extent. The term was introduced into scientific literature by François E. Matthes in 1939. Matthes described glaciers in the Sierra Nevada of California that he believed could not have survived the hypsithermal; his usage of "Little Ice Age" has been superseded by " Neoglaciation". The period has been conventionally defined as extending from the 16th to the 19th centuries, (noted in Grove 2004:4). but some experts prefer an alternative timespan from about 1300 to about 1850. The NASA Earth Observatory notes three particularly cold intervals. One began about 1650, another about 1770, and the last in 1850, all of which were separated by intervals of slight warming. The Intergovernmental Panel on Climate Change Third Assessment Report considered that the timing and the areas affected by the Little Ice Age suggested largely indep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
