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King Island Pluton
The King Island Pluton is a mid-to-late Miocene intrusion of syenite and alkali granite on the Central Coast of British Columbia, Canada. It is over long and wide, extending from King Island in the west to the mainland in the east. The pluton is exposed in cliffs along the Dean and Burke channels west of Bella Coola. The King Island Pluton is petrographically similar to the shield volcanoes in the central Anahim Volcanic Belt. As a result, the pluton is thought to represent the magma chamber A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upw ... of an extinct volcanic centre that has since eroded away. At the time of its formation, the pluton was emplaced below the surface. References Igneous intrusions Anahim Volcanic Belt Central Coast of British Columbia Miocene magmati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anahim Volcanic Belt-en
Anahim is a name used for several features in British Columbia, Canada, derived from the name of Chief Anahim, a leader of the Tsilhqot'in people in the mid-19th Century: *Anahim Lake, British Columbia, a community in the west-central part of the province * Anahim Lake Airport, the airport of the community of Anahim Lake *Anahim Peak, a volcano in the Anahim Volcanic Belt *Anahim hotspot, an inferred mantle plume feeding the Anahim Volcanic Belt *Anahim Volcanic Belt The Anahim Volcanic Belt (AVB) is a west–east trending chain of volcanoes and related magmatic features in British Columbia, Canada. It extends from Athlone Island on the Central Coast, running eastward through the strongly uplifted and deeply ..., a linear belt of volcanoes Various Indian Reserves of the Tl'etinqox-t'in Government are named Anahim No. 10, Anahim No. 11 etc. Their main reserve community is known by a variant name, Anaham. {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bella Coola, British Columbia
Bella Coola is a community in the Bella Coola Valley, in British Columbia, Canada. ''Bella Coola'' usually refers to the entire valley, encompassing the settlements of Bella Coola proper ("the townsite"), Lower Bella Coola, Hagensborg, Salloompt, Nusatsum, Firvale, and Stuie. It is also the location of the head offices of the Central Coast Regional District. The entire Bella Coola Valley has a population of 2,163 as of the 2021 census. This was an increase of 8% from the 2016 census, when the population was 2,007. Geography The primary geographical structure of the community, both in terms of physical structures and population distribution, is the long, narrow Bella Coola River valley. The river meanders along the eastern and northern edges of the town before discharging into the head of North Bentinck Arm. Highway 20 (known over most of its length as the Chilcotin Highway) stretches from the Government wharf (on the Pacific Ocean) through the extent of the populated port ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Coast Of British Columbia
, settlement_type = Region of British Columbia , image_skyline = , nickname = "The Coast" , subdivision_type = Country , subdivision_name = Canada , subdivision_type1 = Province , subdivision_name1 = British Columbia , parts_type = Principal cities , p1 = Vancouver , p2 = Surrey , p3 = Burnaby , p4 = Richmond , p5 = Abbotsford , p6 = Coquitlam , p7 = Delta , p8 = Nanaimo , p9 = Victoria , p10 = Chilliwack , p11 = Maple Ridge , p12 = New Westminster , p13 = Port Coquitlam , p14 = North Vancouver , area_blank1_title = 15 Districts , area_blank1_km2 = 244,778 , area_footnotes = , elevation_max_m = 4019 , elevation_min_m = 0 , elevation_max_footnotes = M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igneous Intrusions
Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive rocks. Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form natural glasses. Igneous rocks occur in a wide range of geological settings: shields, platforms, orogens, basins, large igneous provinces, extended crust and oceanic crust. Geological significance Igneous and metamorphic rocks make up 90–95% of the top ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma Chamber
A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upwards. If the magma finds a path to the surface, then the result will be a volcanic eruption; consequently, many volcanoes are situated over magma chambers. These chambers are hard to detect deep within the Earth, and therefore most of those known are close to the surface, commonly between 1 km and 10 km down. Dynamics of magma chambers Magma rises through cracks from beneath and across the crust because it is less dense than the surrounding rock. When the magma cannot find a path upwards it pools into a magma chamber. These chambers are commonly built up over time, by successive horizontal or vertical magma injections. Influx of new magma causes reaction of pre-existing crystals and the pressure in the chamber to increase. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anahim Volcanic Belt
The Anahim Volcanic Belt (AVB) is a west–east trending chain of volcanoes and related magmatic features in British Columbia, Canada. It extends from Athlone Island on the Central Coast, running eastward through the strongly uplifted and deeply dissected Coast Mountains to near the community of Nazko on the Interior Plateau. The AVB is delineated as three west-to-east segments that differ in age and structure. A wide variety of igneous rocks with differing compositions occur throughout these segments, comprising landforms such as volcanic cones, volcanic plugs, lava domes, shield volcanoes and intrusions. Volcanic activity has occurred repeatedly in the AVB for the last 15 million years, during which time three major magmatic episodes took place 15–13, 9–6 and 3–1 million years ago. These major magmatic episodes are represented by plutons, dike swarms, volcanic fields and large shield volcanoes. Volcanic activity in the last 1 million years has been relatively minor an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shield Volcano
A shield volcano is a type of volcano named for its low profile, resembling a warrior's shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano. Repeated eruptions result in the steady accumulation of broad sheets of lava, building up the shield volcano's distinctive form. Shield volcanoes are found wherever fluid low-silica lava reaches the surface of a rocky planet. However, they are most characteristic of ocean island volcanism associated with hot spots or with continental rift volcanism. They include the largest volcanoes on earth, such as Tamu Massif and Mauna Loa. Giant shield volcanoes are found on other planets of the Solar System, including Olympus Mons on Mars and Sapas Mons on Venus. Etymology The term 'shield volcano' is taken from the German term ''Schildvulkan'', coined by the Austrian geologist Eduard Suess in 1888 an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petrographically
Petrography is a branch of petrology that focuses on detailed descriptions of rocks. Someone who studies petrography is called a petrographer. The mineral content and the textural relationships within the rock are described in detail. The classification of rocks is based on the information acquired during the petrographic analysis. Petrographic descriptions start with the field notes at the outcrop and include macroscopic description of hand specimens. The most important petrographer's tool is the petrographic microscope. The detailed analysis of minerals by optical mineralogy in thin section and the micro-texture and structure are critical to understanding the origin of the rock. Electron microprobe or atom probe tomography analysis of individual grains as well as whole rock chemical analysis by atomic absorption, X-ray fluorescence, and laser-induced breakdown spectroscopy are used in a modern petrographic lab. Individual mineral grains from a rock sample may also be analyzed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NRC Research Press
Canadian Science Publishing (CSP) is Canada's largest publisher of international scientific journals. It started in 1929 as the ''NRC Research Press'', part of the National Research Council (NRC). In 2010, the organization spun off from NRC and was incorporated as a not-for-profit. As of 2018, CSP has published about 2,300 articles annually in 24 journals distributed to over 125 countries. CSP has 50 staff members, and, according to the website Owler, its annual revenue is about US$3.7M. All of CSP's journals are produced and delivered in both HTML and PDF formats, is connected to scientific literature, included in all major indexes, and archived through both CLOCKSS and Portico. Open access CSP has an ''OpenArticle'' program, which permits authors and/or research funding agencies to sponsor online open access of their article. It also has auto-deposit of accepted manuscripts into the University of Toronto ''TSpace'', a free and secure research repository; and an adoption ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Journal Of Earth Sciences
The ''Canadian Journal of Earth Sciences'' is a monthly peer-reviewed scientific journal established in 1963, which reports current research on all aspects of the Earth sciences. It is published by NRC Research Press. The journal also publishes special issues that focus on information and studies limited in scope to a specific segment of the Earth sciences. The editor-in-chief is Dr. Brendan Murphy (St. Francis Xavier University) and Sally Pehrsson (University of Saskatchewan). According to the ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as ... of 1.369. References External links * {{Authority control Earth and atmospheric sciences journals Monthly journals Publications established in 1963 Canadian Scie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burke Channel
Burke Channel is a channel in the Central Coast region of the Canadian province of British Columbia, separating the south and east coasts of King Island from the mainland. It was first charted in 1792 by James Johnstone, one of George Vancouver's officers during his 1791-1795 expedition. Vancouver named it "Burke's Channel" after Edmund Burke Edmund Burke (; 12 January NS.html"_;"title="New_Style.html"_;"title="/nowiki>New_Style">NS">New_Style.html"_;"title="/nowiki>New_Style">NS/nowiki>_1729_–_9_July_1797)_was_an_ NS.html"_;"title="New_Style.html"_;"title="/nowiki>New_Style"> .... References Channels of British Columbia Central Coast of British Columbia Edmund Burke {{BritishColumbiaCoast-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
