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List Of Volcanoes In Chad ...
This is a list of active and extinct volcanoes in Chad. References Notes {{Reflist Chad Volcanoes A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chad
Chad (; ar, تشاد , ; french: Tchad, ), officially the Republic of Chad, '; ) is a landlocked country at the crossroads of North and Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon to the southwest, Nigeria to the southwest (at Lake Chad), and Niger to the west. Chad has a population of 16 million, of which 1.6 million live in the capital and largest city of N'Djamena. Chad has several regions: a desert zone in the north, an arid Sahelian belt in the centre and a more fertile Sudanian Savanna zone in the south. Lake Chad, after which the country is named, is the second-largest wetland in Africa. Chad's official languages are Arabic and French. It is home to over 200 different ethnic and linguistic groups. Islam (55.1%) and Christianity (41.1%) are the main religions practiced in Chad. Beginning in the 7th millennium BC, human populations moved into the Chadian basin in great numbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographic Coordinates
The geographic coordinate system (GCS) is a spherical or ellipsoidal coordinate system for measuring and communicating positions directly on the Earth as latitude and longitude. It is the simplest, oldest and most widely used of the various spatial reference systems that are in use, and forms the basis for most others. Although latitude and longitude form a coordinate tuple like a cartesian coordinate system, the geographic coordinate system is not cartesian because the measurements are angles and are not on a planar surface. A full GCS specification, such as those listed in the EPSG and ISO 19111 standards, also includes a choice of geodetic datum (including an Earth ellipsoid), as different datums will yield different latitude and longitude values for the same location. History The invention of a geographic coordinate system is generally credited to Eratosthenes of Cyrene, who composed his now-lost ''Geography'' at the Library of Alexandria in the 3rd century ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emi Koussi
Emi Koussi (also known as Emi Koussou) is a high pyroclastic shield volcano that lies at the southeast end of the Tibesti Mountains in the central Sahara, in the northern Borkou Region of northern Chad. The highest mountain of the Sahara, the volcano is one of several in the Tibesti range, and reaches an elevation of , rising above the surrounding sandstone plains. The volcano is wide and has a volume of . Two nested calderas cap the volcano, the outer one being about in size. Within it on the southeast side is a smaller caldera known as Era Kohor, about wide and deep. Numerous lava domes, cinder cones, maars, and lava flows are found within the calderas and along the outer flanks of the shield. Era Kohor contains trona deposits, and Emi Koussi has been studied as an analogue of the Martian volcano Elysium Mons. Emi Koussi was active more than one million years ago, but some eruptions may be more recent, and there is ongoing fumarolic and hot spring activity. Geography a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregon State University
Oregon State University (OSU) is a public land-grant, research university in Corvallis, Oregon. OSU offers more than 200 undergraduate-degree programs along with a variety of graduate and doctoral degrees. It has the 10th largest engineering college in the nation for 2022. Undergraduate enrollment for all colleges combined averages close to 32,000, making it the state's largest university. Out-of-state students make up over one-quarter of undergraduates and an additional 5,500 students are engaged in graduate coursework through the university. Since its founding, over 272,000 students have graduated from OSU. It is classified among "Doctoral Universities – Very high research activity". Chartered as a land-grant university initially, OSU became one of the four inaugural members of the Sea Grant in 1971. It joined the Space Grant and Sun Grant research consortia in 1991 and 2003, respectively, making it the first public university and one of just four in total to attain memb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarso Toh
Tarso Toh (also known as Tarso Toon or Tarson Tôh) is a volcanic field located in Chad, north of Tarso Toussidé volcano. It fills valleys and plains over an area of 80 km in east-west direction and 20–30 km in north-south direction. It contains 150 scoria cones and two maars. Tarso Toh is a volcanic plateau and has lateral dimensions of , resulting in a surface area of about . It rises to elevations of above sea level and above the surrounding terrain. The plateau encompasses about 150 separate volcanoes, some of which are found in remnants. Some lava flows at Tarso Toh have reached large distances. Part of the field is the Begour crater. It is about wide and is mostly dry with the exception of several small ponds and a ring of diatom- and mollusc-containing sediments which forms a ring terrace inside the crater. Radiocarbon dating has yielded ages of 8,300 ± 300 years ago on sediments within Begour, and Tarso Toh is considered to be a Holocene volcano. The T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarso Toon
Tarso Toon (sometimes also known as Tarso Toh; "Tarso" means "high plateau".) is a volcano in the central Tibesti mountains. The volcano reaches a maximum height of and a width of , covering a surface of . It also features a caldera wide, with a gap on its northern side. It was active in the Miocene, developing over older ignimbrites with tholeiitic rocks. Later, felsic In geology, felsic is a modifier describing igneous rocks that are relatively rich in elements that form feldspar and quartz.Marshak, Stephen, 2009, ''Essentials of Geology,'' W. W. Norton & Company, 3rd ed. It is contrasted with mafic rocks, whi ... volcanic rocks were emplaced within the caldera and the Voon ignimbrite buried parts of the tholeiite. References Sources * External links {{Commons-inline, Tarso Toon See also * Tarso Toh, an unrelated volcano Miocene shield volcanoes Volcanoes of Chad Calderas of Chad Polygenetic shield volcanoes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarso Voon
The Tarso Voon is a high stratovolcano in the north of the Republic of Chad. It is located in the western center of the Tibesti Mountains. The summit of the mountain is dominated by the relatively flat caldera. Extensive basaltic flows lie on the northeastern side in a 180-degree arc and are a result of the high activity in the Quaternary. In the neighborhood in northwestern direction is the Ehi Mosgau, a stratovolcano with the same elevation, above sea level. Deposits from pyroclastic clouds are found around the caldera. The mountain was constructed over a basement of Precambrian schists. The well known Soborom Solfataric field is the largest in the Tibesti Mountains, it is located about west of the summit rim. The active fumaroles, mudpots and hot springs are visited by the people of the Tibesti for medical purposes. See also * List of volcanoes in Chad This is a list of active and extinct volcanoes in Chad. References Notes {{Reflist Chad Volcanoes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarso Yega
Tarso Yega ("well", tedaga) is a stratovolcano in Tibesti, with a summit caldera that is wide and deep. The summit of the volcano reaches a height of , and its caldera is the largest caldera of the Tibesti. Neighbouring volcanoes include Doudriki east, Ehi Dosoatou south and Ehi Fodoboro southwest of the caldera. The Enneri Yega river drains the caldera westward and then south, before joining the Enneri Debarsar; in the past (Holocene) the rivers reached Lake Chad and lakes formed in Tarso Yega. The history of the volcano is characterized by the emission of tephras, with the downsagging of the caldera floor generating a depression. Basaltic vents and lava domes were emplaced within this caldera, and an intrusion named Ehi Yodéï developed farther south. The caldera is heavily eroded, with almost the entire southern side eroded away, and the younger Voon ignimbrite has been emplaced inside of it; it belongs to a different volcano, Tarso Voon. Humans have used the caldera for irr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
