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Temagami Magnetic Anomaly
The Temagami Magnetic Anomaly, also called the Temagami Anomaly or the Wanapitei Anomaly, is a magnetic anomaly resulting from a large buried geologic structure in the Canadian Shield near Temagami, Ontario, Canada. It stretches from Lake Wanapitei in the west to Bear Island in Lake Temagami. The Aboriginal community of Teme-Augama Anishnabai lies partly within the Temagami Magnetic Anomaly, including the Temagami First Nation on Bear Island. Located nearby are a number of other geological structures, including the Sudbury Basin, the Lake Wanapitei impact crater, and the Temagami Greenstone Belt. Discovery and structure The Temagami Magnetic Anomaly is egg-shaped, long and wide. The central section has the greatest amplitude and an east-west strike. The western portion appears smoother in character while the eastern section is long and narrow. With an areal extent of 50 x 15 km, it reaches a magnitude of approximately 10,000 nanoteslas, making it one of the largest p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Anomaly
In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by overlying material. The magnetic variation (geomagnetic reversals) in successive bands of ocean floor parallel with mid-ocean ridges was important evidence for seafloor spreading, a concept central to the theory of plate tectonics. Measurement Magnetic anomalies are generally a small fraction of the magnetic field. The total field ranges from 25,000 to 65,000 nanoteslas (nT). To measure anomalies, magnetometers need a sensitivity of 10 nT or less. There are three main types of magnetometer used to measure magnetic anomalies: # The fluxgate magnetometer was developed during World War II to detect submarines. It measures the component along a particular axis of the sensor, so it needs to be oriented. On land, it is often oriented vertically, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temagami Greenstone Belt
The Temagami Greenstone Belt (TGB) is a small 2.7 billion year old greenstone belt in the Temagami region of Northeastern Ontario, Canada. It represents a feature of the Superior craton, an ancient and stable part of the Earth's lithosphere that forms the core of the North American continent and Canadian Shield. The belt is composed of metamorphosed volcanic rocks that range in composition from basalt to rhyolite. These form the east-northeast trend of the belt and are overlain by metamorphosed sedimentary rocks. They were created during several volcanic episodes involving a variety of eruptive styles ranging from passive lava eruptions to viscous explosive eruptions. Part of the Canadian Shield, the TGB contains some of the oldest known rocks on Earth. The belt is made up of a number of geologic features such as batholiths, stocks, dikes, volcanic complexes, layered intrusions and deformation zones. These are situated in several geographical townships in the municipality of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ishpatina Ridge
Ishpatina Ridge is the highest point of land in the Canadian province of Ontario, at an estimated above sea level. Ishpatina Ridge rises approximately above the immediate area. It was only truly recognized as Ontario's highest point after topographical mapping by the Government of Canada revealed this fact in the 1970s. Before then, the more popular Maple Mountain was thought to be higher. The ridge lies in Lady Evelyn-Smoothwater Provincial Park. Due to its remote location, Ishpatina Ridge is a challenge to reach. The closest major highway, Highway 560, is more than 30 km north. There are a few logging roads and trails in the remote area, but they are difficult to travel in poor weather. The most popular approach route to Ishpatina is by canoe/portage via a logging road to the south out of the town of Capreol north of Sudbury. While a northern route exists (out of Gowganda, the nearest community), there are numerous portages making it particularly onerous. This rou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kursk Magnetic Anomaly
Kursk Magnetic Anomaly (russian: Курская магнитная аномалия) is a territory rich in iron ores located within the Kursk, Belgorod, and Voronezh oblasts in Russia, and constitutes a significant part of the Central Chernozyom Region. The Kursk Magnetic Anomaly is recognized as the largest magnetic anomaly on Earth. The Kursk Magnetic Anomaly (KMA) was first discovered in 1773 by the Russian astronomer and academic Pyotr Inokhodtsev while preparing the maps of the General Land Survey (russian: Генеральное межевание) at the behest of the Russian government. It was not investigated again until 1874 when I. N. Smirnov conducted the first geomagnetic survey of European Russia. In 1883, N. D. Pilchikov, an assistant professor at Kharkiv University, conducted a series of 71 observations of the Kursk Magnetic Anomaly. These revealed a much larger extent than previously measured and for the first time attributed the anomaly to the presence of i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bangui Magnetic Anomaly
The Bangui magnetic anomaly is a local variation in the Earth's magnetic field centered at Bangui, the capital of Central African Republic. The magnetic anomaly is roughly elliptical, about , and covers most of the country, making it one of the "largest and most intense crustal magnetic anomalies on the African continent". The anomaly was discovered in the late 1950s, explored in the 1970s, and named in 1982. Its origin remains unclear. History In 1962, Raymond Godivier and Lucien Le Donche reported on a magnetic anomaly in Central African Republic, which they identified by analyzing their surface magnetic activity data of 1956. These results were confirmed and built upon by the high-altitude aeromagnetic surveys carried out by the US Naval Oceanographic Office, as well as by the satellite measurements conducted in 1964 with Cosmos 49 and in the 1970s with the Orbiting Geophysical Observatory at altitudes. This data was combined in 1973 and yielded a spatial map of Earth's magne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maple Mountain (Ontario)
Maple Mountain is a mountain, located within Lady Evelyn-Smoothwater Provincial Park, Northeastern Ontario, Canada, estimated above mean sea level. It has a higher vertical rise over the surrounding landscape, {{convert, 37, m, ft, 0, abbr=on higher than the Ishpatina Ridge, which is the highest point of land in Ontario rising over Scarecrow Lake. Maple Mountain rises over Tupper Lake and is considerably better known than Ishpatina Ridge. It ranks thirteenth, but when ranked by vertical rise it is the highest of the top 25 peaks in Ontario. The 100-ft fire tower is also still intact and attracts many hikers. A 3.2 kilometre long hiking trail leads to the abandoned fire tower. Located in Timiskaming District of Northeastern Ontario, the mountain is not very accessible; roads and trails in the remote area are difficult to travel in poor weather. The most popular approach routes to Maple Mountain are by canoe and/or float plane. The indigenous Temagami First Nation call the mounta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orders Of Magnitude (magnetic Field)
This page lists examples of magnetic induction B in teslas and gauss produced by various sources, grouped by orders of magnitude. Note: * Traditionally, magnetizing field H, is measured in amperes per meter. * Magnetic induction B (also known as magnetic flux density) has the SI unit tesla or Wb/m2 * One tesla is equal to 104 gauss. * Magnetic field drops off as the cube of the distance from a dipole source. Examples These examples attempt to make the measuring point clear, usually the surface of the item mentioned. References {{DEFAULTSORT:Orders Of Magnitude (Magnetic Field) Magnetic Field A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to ... Magnetism ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temagami Magnetic Anomaly -magnetics Map
Temagami, formerly spelled as Timagami, is a municipality in northeastern Ontario, Canada, in the Nipissing District with Lake Temagami at its heart. The Temagami region is known as ''n'Daki Menan'', the homeland of the area's First Nations community, most of whom are Anishinaabe (Ojibwe), living on Bear Island. The official name for this group is the Temagami First Nation. However, a larger group that includes these people, plus non-status residents and some non-residents is called the Teme-Augama Anishnabai. Some of the main tourist attractions within the community include old-growth red and white pine, Lake Temagami, Caribou Mountain, fishing, showings of Grey Owl from the 1930s, and over of canoe routes. It is also known as the staging point for cottage vacationing and wilderness canoeing trips on Lake Temagami, in Lady Evelyn-Smoothwater Provincial Park, and vast tracts of wilderness in the area. There are several outfitters here that cater to outdoor activity. The co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sudbury Basin
The Sudbury Basin (), also known as Sudbury Structure or the Sudbury Nickel Irruptive, is a major geological structure in Ontario, Canada. It is the third-largest known impact crater or astrobleme on Earth, as well as one of the oldest. The crater formed 1.849 billion years ago in the Paleoproterozoic era. The basin is located on the Canadian Shield in the city of Greater Sudbury, Ontario. The former municipalities of Rayside-Balfour, Valley East and Capreol lie within the Sudbury Basin, which is referred to locally as "The Valley". The urban core of the former city of Sudbury lies on the southern outskirts of the basin. An Ontario Historical Plaque was erected by the province to commemorate the discovery of the Sudbury Basin. Formation The Sudbury basin formed as a result of an impact into the Nuna supercontinent from a bolide approximately in diameter that occurred 1.849 billion years ago in the Paleoproterozoic era. Debris from the impact was scattered over an area of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Shield
The Canadian Shield (french: Bouclier canadien ), also called the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), the ancient geologic core of the North American continent. Glaciation has left the area with only a thin layer of soil, through which exposures of igneous bedrock resulting from its long volcanic history are frequently visible. As a deep, common, joined bedrock region in eastern and central Canada, the Shield stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada and most of Greenland; it also extends south into the northern reaches of the United States. Geographical extent The Canadian Shield is a physiographic division comprising four smaller physiographic provinces: the Laurentian Upland, Kazan Region, Davis and James. The shield extends into the United States as the Adirondack Mountains (connected by the Fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temagami First Nation
The Temagami First Nation is located on Bear Island in the heart of Lake Temagami. The island is the second largest in Lake Temagami, after Temagami Island. Its community is known as Bear Island 1. Temagami First Nation (TFN) members are status Indians under the Indian Act that live on and off Bear Island. The Teme-Augama Anishnabai ("Deep Water by the Shore People") are part of the (Anishinaabe) people, and Bear Island represents only a small portion of the Anishinaabe's ''Nindakiiminan'' ("our land"; locally syncoped as ''Ndakiimnan'' or "n'daki menan"), which includes over ten thousand square kilometers of land in the area. Some citizens are status Indian (TFN) within the framework of the Indian Act. The majority are not accorded status under the Indian Act, but are still recognized as full community members by the Teme-Augama Anishnabai. Human occupation The Temagami First Nation website states, "The Teme-Augama Anishnabai have utilized the Temagami region of Canada for ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teme-Augama Anishnabai
The Teme-Augama Anishnabai (from the Anishinaabe ''Dimii'aagamaa Anishinaabe'', "the deep water people") is the Indigenous Anishinaabe community of the Temagami First Nation. The Teme-Augama Anishnabai have trapped and hunted animals in the Temagami region of Canada for over 5,000 years. Bear Island on Lake Temagami is home to the Aboriginal community. Land claims In 1973, The Teme-Augama Anishnabai exercised a land caution against development on the Crown land of 10,000 square kilometres-most of the Temagami area. The attorney-general of Ontario pursued legal action against the Band for this caution. The Teme-Augama Anishnabai lost this court case in 1984 and proceeded with an appeal to the Supreme Court. In 1988, the Ontario Minister of Natural Resources, Vince Kerrio approved the expansion of the Red Squirrel logging road, directly through Anishinaabe territory. This prompted a series of roadblocks by the Teme-Augama Anishnabai and by environmentalists in 1988-1989. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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