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Hells Gate (British Columbia)
Hells Gate is an abrupt narrowing of British Columbia's Fraser River, located immediately downstream of Boston Bar in the southern Fraser Canyon. The towering rock walls of the Fraser River plunge toward each other forcing the waters through a passage only wide. It is also the name of the rural locality at the same location. For centuries, the narrow passage has been a popular fishing ground for Aboriginal communities in the area. European settlers also began to congregate there in the summer months to fish. Eventually, the Fraser Canyon became a route used by gold rush miners wishing to access the upper Fraser gold-bearing bars and the upper country beyond up the Fraser and the Thompson. In the 1880s the Canadian Pacific Railway (CPR) built a transcontinental railroad that passed along the bank at Hells Gate, and in 1911 the Canadian Northern Railway (CNoR) began constructing a second track. In 1914 a large rockslide triggered by CNoR construction fell into the river at Hells G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hell's Gate
Hells Gate or Hell's Gate or Hell Gate may refer to: Places Africa * Hell's Gate National Park, Kenya Antarctica * Hells Gate Moraine, Victoria Land Asia * Nyalam Town, Tibet * A location in Nampong, Arunachal Pradesh, India * The Darvaza gas crater, Turkmenistan Australia * A tourist stop on the Savannah Way in Queensland near the NT border * A large cattle station near Maude, New South Wales * The Hells Gates (Tasmania), entrance to Macquarie Harbour on the western coast of Tasmania. Caribbean * Hell's Gate, Saba, a village on the Caribbean island of Saba * Hell's Gate Island, in Antigua and Barbuda Europe * Walkington Wold, East Yorkshire, Britain North America ;Canada * Hells Gate, British Columbia, a narrow gorge on the Fraser River * Hell Gate canyon and Hell Gate Rapids on the Liard River in far northern British Columbia ;United States * Hells Gate, gap in Cochise County, Arizona * Hells Gate, gap in Gila County, Arizona * Hells Gate, gap in Santa Cruz County, Arizona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as Stream#Creek, creek, Stream#Brook, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to Geographical feature, geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "Burn (landform), burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague. Rivers are part of the water cycle. Water generally collects in a river from Precipitation (meteorology), precipitation through a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interglacial
An interglacial period (or alternatively interglacial, interglaciation) is a geological interval of warmer global average temperature lasting thousands of years that separates consecutive glacial periods within an ice age. The current Holocene interglacial began at the end of the Pleistocene, about 11,700 years ago. Pleistocene During the 2.5 million years of the Pleistocene, numerous glacials, or significant advances of continental ice sheets, in North America and Europe, occurred at intervals of approximately 40,000 to 100,000 years. The long glacial periods were separated by more temperate and shorter interglacials. During interglacials, such as the present one, the climate warms and the tundra recedes polewards following the ice sheets. Forests return to areas that once supported tundra vegetation. Interglacials are identified on land or in shallow epicontinental seas by their paleontology. Floral and faunal remains of species pointing to temperate climate and indicating a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reservoir
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, through excavation, or building any number of retaining walls or levees. In other contexts, "reservoirs" may refer to storage spaces for various fluids; they may hold liquids or gasses, including hydrocarbons. ''Tank reservoirs'' store these in ground-level, elevated, or buried tanks. Tank reservoirs for water are also called cisterns. Most underground reservoirs are used to store liquids, principally either water or petroleum. Types Dammed valleys Dammed reservoirs are artificial lakes created and controlled by a dam A dam is a barrier that stops or restricts the flow of surface water or underground streams ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deglaciation
Deglaciation is the transition from full glacial conditions during ice ages, to warm interglacials, characterized by global warming and sea level rise due to change in continental ice volume. Thus, it refers to the retreat of a glacier, an ice sheet or frozen surface layer, and the resulting exposure of the Earth's surface. The decline of the cryosphere due to ablation can occur on any scale from global to localized to a particular glacier. After the Last Glacial Maximum (ca. 21,000 years ago), the last deglaciation begun, which lasted until the early Holocene. Around much of Earth, deglaciation during the last 100 years has been accelerating as a result of climate change, partly brought on by anthropogenic changes to greenhouse gases. The previous deglaciation took place from approximately 22 ka until 11.5 ka. This occurred when there was an annual mean atmospheric temperature on the earth that increased by roughly 5 °C, which was also accompanied by regional hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isotope Analysis
Isotope analysis is the identification of isotopic signature, abundance of certain stable isotopes of chemical elements within organic and inorganic compounds. Isotopic analysis can be used to understand the flow of energy through a food web, to reconstruct past environmental and climatic conditions, to investigate human and animal diets, for food authentification, and a variety of other physical, geological, palaeontological and chemical processes. Stable isotope ratios are measured using mass spectrometry, which separates the different isotopes of an element on the basis of their mass-to-charge ratio. Tissues affected Isotopic oxygen is incorporated into the body primarily through ingestion at which point it is used in the formation of, for archaeological purposes, bones and teeth. The oxygen is incorporated into the hydroxylcarbonic apatite of bone and tooth enamel. Bone is continually remodelled throughout the lifetime of an individual. Although the rate of tur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First Nations In Canada
First Nations (french: Premières Nations) is a term used to identify those Indigenous Canadian peoples who are neither Inuit nor Métis. Traditionally, First Nations in Canada were peoples who lived south of the tree line, and mainly south of the Arctic Circle. There are 634 recognized First Nations governments or bands across Canada. Roughly half are located in the provinces of Ontario and British Columbia. Under Charter jurisprudence, First Nations are a "designated group," along with women, visible minorities, and people with physical or mental disabilities. First Nations are not defined as a visible minority by the criteria of Statistics Canada. North American indigenous peoples have cultures spanning thousands of years. Some of their oral traditions accurately describe historical events, such as the Cascadia earthquake of 1700 and the 18th-century Tseax Cone eruption. Written records began with the arrival of European explorers and colonists during the Age of Dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simon Fraser (explorer)
Simon Fraser (20 May 1776 – 18 August 1862) was a fur trader and explorer of Scottish ancestry who charted much of what is now the Canadian province of British Columbia. He also built the first European settlement in British Columbia. Employed by the Montreal-based North West Company, he had been by 1805 put in charge of all of the company's operations west of the Rocky Mountains. He was responsible for building that area's first trading posts, and in 1808, he explored what is now known as the Fraser River, which bears his name. Fraser's exploratory efforts were partly responsible for Canada's boundary later being established at the 49th parallel (after the War of 1812) since he, as a British subject, was the first European to establish permanent settlements in the area. According to the historian Alexander Begg, Fraser "was offered a knighthood but declined the title due to his limited wealth." [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bill Ricker
William Edwin Ricker, (August 11, 1908 – September 8, 2001) is an important founder of fisheries science. He is best known for the Ricker model, which he developed in his studies of stock and recruitment in fisheries. The model can be used to predict the number of fish that will be present in a fishery. He also had an international standing as an entomologist and a scientific editor. He published 296 papers and books, 238 translations, and 148 scientific or literary manuscripts.Beamish et al. His 1958 publication, "Handbook of computation for biological statistics of fish populations" and later updates were the standard books on the subject for decades. Achievements Born in Waterdown, Ontario; Ricker was an authority in the taxonomy of stoneflies, and evolved an elegant classification which his fellow entomologists praised as "a thing of beauty and simplicity that made evolutionary sense". In fisheries, he researched issues centred on Canadian fisheries and how to manage the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishway
A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as movements of potamodromous species. Most fishways enable fish to pass around the barriers by swimming and leaping up a series of relatively low steps (hence the term ''ladder'') into the waters on the other side. The velocity of water falling over the steps has to be great enough to attract the fish to the ladder, but it cannot be so great that it washes fish back downstream or exhausts them to the point of inability to continue their journey upriver. History Written reports of rough fishways date to 17th-century France, where bundles of branches were used to make steps in steep channels to bypass obstructions. A pool and weir salmon ladder was built around 1830 by James Smith, a Scottish engineer on the River Teith, near Deanston, Perthshire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Salmon Commission
The Pacific Salmon Commission is a regulatory body run jointly by the Canadian and United States governments. Its mandate is to protect stocks of the five species of Pacific salmon. Its precursor was the International Pacific Salmon Fisheries Commission, which operated from 1937 to 1985. The PSC enforces the Pacific Salmon Treaty, ratified by Canada and the U.S. in 1985. Origins Pacific salmon have been an important food source and trade commodity for Northwest First Nations peoples for millennia. After European explorers arrived, the first large-scale commercial salmon fisheries were started in the early 1800s. Lucrative fisheries were established on the Columbia and Fraser rivers, including canneries geared for export. Harvests increased year-to-year until the 1910s. The abundance of the resource had precluded any disagreements between the Canadian and American governments until this point. However, from the 1920s onward, stocks began to decline, a result of over-fishing and ... [...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 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and 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 most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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