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Castleguard Flags
Castleguard Cave is a limestone cave located at the north end of Banff National Park in the Rocky Mountains of Alberta, Canada. With of surveyed passages (as of 2024), it is Canada's longest cave, and its tenth deepest at . Castleguard Cave ascends gently from its entrance and terminates beneath the Columbia Icefield. General information Castleguard Cave is modest in size compared to other great caves of the world, but nevertheless is well known amongst cavers and speleologists internationally. It is the subject of a film and a coffee-table book, and is mentioned in most cave reference books in print. This attention is due in part to its magnificent, remote mountain setting. Its location within a protected area in a national park prohibits motorized ground access, and the risk of flooding in its entrance has limited most explorations to mid or late winter, so cavers must access it via a ski with towed sleds, or by helicopter. This feeling of remoteness is compounded b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phreatic
''Phreatic'' is a term used in hydrology to refer to aquifers, in speleology to refer to cave passages, and in volcanology to refer to a type of volcanic eruption. Hydrology The term phreatic (the word originates from the Greek , meaning "well" or "spring") is used in hydrology and the earth sciences to refer to matters relating to groundwater (an aquifer) below the water table. The term 'phreatic surface' indicates the location where the pore water pressure is under atmospheric conditions (i.e., the pressure head is zero). This surface usually coincides with the water table. The slope of the phreatic surface is assumed to indicate the direction of groundwater movement in an unconfined aquifer. The phreatic zone, below the phreatic surface where rock and soil are saturated with water, is the counterpart of the vadose zone, or unsaturated zone, above. Unconfined aquifers are also called phreatic aquifers because the phreatic surface provides their upper boundary. Speleolog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves Of Alberta
Caves or caverns are natural voids under the Earth's surface. Caves often form by the weathering of rock and often extend deep underground. Exogene caves are smaller openings that extend a relatively short distance underground (such as rock shelters). Caves which extend further underground than the opening is wide are called endogene caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as ''speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorganisms, pressure, and atmospheric influences. Isotopic dating techniques can be applied to cave sediments, to determine the time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Canadian Caver
''The Canadian Caver'' is a semiannual publication that documents the activities of Canadian cavers exploring caves within Canada and overseas. ''The Canadian Caver'' was created by members of the McMaster University Climbing and Caving Club from McMaster University in Hamilton, Ontario to document cave explorations throughout North America at a time when Canada's fledgeling caving clubs had no club newsletters. The first issue was produced in December 1969 and included articles on cave exploration in Alberta, Mexico, West Virginia and Georgia, and climbing in the Bugaboos of British Columbia.''The Canadian Caver'' No.1, December 1969 By 1974 caving clubs in western Canada had achieved a level of maturity and stability (aided by the emigration of MUCCC cavers) that allowed the production and editorship of ''The Canadian Caver'' to move to Edmonton, Alberta, where it remained for several years. In 1978 cavers from Vancouver Island Vancouver Island is an island in the nor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave Survey
A cave survey is a map of all or part of a cave system, which may be produced to meet differing standards of accuracy depending on the cave conditions and equipment available underground. Cave surveying and cartography, i.e. the creation of an accurate, detailed map, is one of the most common technical activities undertaken within a cave and is a fundamental part of speleology. Surveys can be used to compare caves to each other by length, depth and volume, may reveal clues on speleogenesis, provide a spatial reference for other areas of scientific study and assist visitors with route-finding. Traditionally, cave surveys are produced in two-dimensional form due to the confines of print, but given the three-dimensional environment inside a cave, modern techniques using computer aided design are increasingly used to allow a more realistic representation of a cave system. History The first known plan of a cave dates from 1546, and was of a man-made cavern in tufa called the Stufe di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phreatic
''Phreatic'' is a term used in hydrology to refer to aquifers, in speleology to refer to cave passages, and in volcanology to refer to a type of volcanic eruption. Hydrology The term phreatic (the word originates from the Greek , meaning "well" or "spring") is used in hydrology and the earth sciences to refer to matters relating to groundwater (an aquifer) below the water table. The term 'phreatic surface' indicates the location where the pore water pressure is under atmospheric conditions (i.e., the pressure head is zero). This surface usually coincides with the water table. The slope of the phreatic surface is assumed to indicate the direction of groundwater movement in an unconfined aquifer. The phreatic zone, below the phreatic surface where rock and soil are saturated with water, is the counterpart of the vadose zone, or unsaturated zone, above. Unconfined aquifers are also called phreatic aquifers because the phreatic surface provides their upper boundary. Speleolog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Film Board
The National Film Board of Canada (NFB; ) is a Canadian public film and digital media producer and distributor. An agency of the Government of Canada, the NFB produces and distributes documentary films, animation, web documentaries, and alternative dramas. In total, the NFB has produced over 43,000 productions since its inception, which have won over 5,000 awards. The NFB reports to the Parliament of Canada through the Minister of Canadian Heritage. It has bilingual production programs and branches in English and French, including multicultural-related documentaries. History Canadian Government Motion Picture Bureau The Canadian Government Motion Picture Bureau, Exhibits and Publicity Bureau was founded on 19 September 1918, and was reorganized into the Canadian Government Motion Picture Bureau in 1923. The organization's budget stagnated and declined during the Great Depression. Frank Badgley, who served as the bureau's director from 1927 to 1941, stated that the bureau ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamilton, Ontario
Hamilton is a port city in the Canadian Provinces and territories of Canada, province of Ontario. Hamilton has a 2021 Canadian census, population of 569,353 (2021), and its Census Metropolitan Area, census metropolitan area, which encompasses Burlington, Ontario, Burlington and Grimsby, Ontario, Grimsby, has a population of 785,184. The city is situated approximately southwest of Toronto in the Greater Toronto and Hamilton Area (GTHA). Conceived by George Hamilton (city founder), George Hamilton when he purchased the James Durand, Durand farm shortly after the War of 1812, the town of Hamilton became the centre of a densely populated and industrialized region at the west end of Lake Ontario known as the Golden Horseshoe. On January 1, 2001, the current boundaries of Hamilton were created through the Merger (politics), amalgamation of the original city with other municipalities of the Regional Municipality of Hamilton–Wentworth. Residents of the city are known as Hamiltonian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McMaster University
McMaster University (McMaster or Mac) is a public research university in Hamilton, Ontario, Canada. The main McMaster campus is on of land near the residential neighbourhoods of Ainslie Wood, Ontario, Ainslie Wood and Westdale, Ontario, Westdale, adjacent to the Royal Botanical Gardens, Ontario, Royal Botanical Gardens. It operates six Faculty (division), academic faculties: the DeGroote School of Business, McMaster Faculty of Engineering, Engineering, McMaster Faculty of Health Sciences, Health Sciences, Humanities, McMaster Faculty of Social Sciences, Social Science, and McMaster Faculty of Science, Science. It is a member of the U15 Group of Canadian Research Universities, U15, a group of research-intensive universities in Canada. The university bears the name of William McMaster, a prominent Canadian Senate of Canada, senator and banker who bequeathed Canadian dollar, C$900,000 to its founding. It was incorporated under the terms of an act of the Legislative Assembly of On ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geographic Magazine
''National Geographic'' (formerly ''The National Geographic Magazine'', sometimes branded as ''Nat Geo'') is an American monthly magazine published by National Geographic Partners. The magazine was founded in 1888 as a scholarly journal, nine months after the establishment of the society, but is now a popular magazine. In 1905, it began including pictures, a style for which it became well known. Its first color photos appeared in the 1910s. During the Cold War, the magazine committed itself to present a balanced view of the physical and human geography of countries beyond the Iron Curtain. Later, the magazine became outspoken on environmental issues. Until 2015, the magazine was completely owned and managed by the National Geographic Society. Since 2015, controlling interest has been held by National Geographic Partners. Topics of features generally concern geography, history, nature, science, and world culture. The magazine is well known for its distinctive appearance: a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castleguard Secfiss
Castleguard Cave is a limestone cave located at the north end of Banff National Park in the Rocky Mountains of Alberta, Canada. With of surveyed passages (as of 2024), it is Canada's longest cave, and its tenth deepest at . Castleguard Cave ascends gently from its entrance and terminates beneath the Columbia Icefield. General information Castleguard Cave is modest in size compared to other great caves of the world, but nevertheless is well known amongst cavers and speleologists internationally. It is the subject of a film and a coffee-table book, and is mentioned in most cave reference books in print. This attention is due in part to its magnificent, remote mountain setting. Its location within a protected area in a national park prohibits motorized ground access, and the risk of flooding in its entrance has limited most explorations to mid or late winter, so cavers must access it via a ski with towed sleds, or by helicopter. This feeling of remoteness is compounded b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave Gate
A cave gate is a manmade barricade typically placed at, or just inside, the entrance to a cave in an effort to impede or mitigate human access to a cave's interior. The reason for gating a cave can be varied, but may include protecting sensitive or endangered bat species, protecting fragile cave resources, or restricting access to dangerous caves. In the United States, an "industry standard" for gate construction has been developed. This standard has been widely used by agencies such as the National Park Service, U.S. Fish and Wildlife, Bureau of Land Management, U.S. Forest Service, The Nature Conservancy, National Speleological Society The National Speleological Society (NSS) is an organization formed in 1941 to advance the exploration, conservation, study, and understanding of caves in the United States. Originally headquartered in Washington D.C., its current offices are in ... and others. This standard focuses on proper gate placement that does not hinder airflow that w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
