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Ravine
A ravine is a landform that is narrower than a canyon and is often the product of streambank erosion. Ravines are typically classified as larger in scale than gullies, although smaller than valleys. Ravines may also be called a cleuch, dell, ghout (Nevis), gill or ghyll, glen, gorge, kloof (South Africa), and chine (Isle of Wight) A ravine is generally a fluvial slope landform of relatively steep (cross-sectional) sides, on the order of twenty to seventy percent in gradient. Ravines may or may not have active streams flowing along the downslope channel which originally formed them; moreover, often they are characterized by intermittent streams, since their geographic scale may not be sufficiently large to support a perennial stream. Definition According to Merriam-Webster, a ravine is "a small, narrow, steep-sided valley that is larger than a gully and smaller than a canyon and that is usually worn by running water". Some societies and languages do not differentiate b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Babi Yar
Babi Yar () or Babyn Yar () is a ravine in the Ukraine, Ukrainian capital Kyiv and a site of massacres carried out by Nazi Germany's forces during Eastern Front (World War II), its campaign against the Soviet Union in World War II. The first and best documented of the massacres took place on 29–30 September 1941, in which some 33,771 Jews were murdered. Other victims of massacres at the site included Soviet prisoner of war, prisoners of war, communists and Romani people. It is estimated that a total of between 100,000 and 150,000 people were murdered at Babi Yar during the German occupation. The decision to murder all the Jews in Kyiv was made by the military governor ''Generalmajor'' Kurt Eberhard, the Police Commander for Army Group South, SS-''Obergruppenführer'' Friedrich Jeckeln, and the ''Einsatzgruppe'' C Commander Otto Rasch. Sonderkommandos of Einsatzgruppen, Sonderkommando 4a as the sub-unit of ''Einsatzgruppe'' C, along with the aid of the Sicherheitsdienst, ''SD' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chine
A chine () is a steep-sided coastal gorge where a river flows to the sea through, typically, soft eroding cliffs of sandstone or clays. The word is still in use in central Southern England—notably in East Devon, Dorset, Hampshire and the Isle of Wight—to describe such topographical features. The term 'bunny' is sometimes used to describe a chine in Hampshire. The term chine is also used in some Vancouver suburbs in Canada to describe similar features. Formation and features Chines appear at the outlet of small river valleys when a particular combination of geology, stream volume, and coastal recession rate creates a knickpoint, usually starting at a waterfall at the cliff edge, that initiates rapid erosion and deepening of the stream bed into a gully leading down to the sea. All chines are in a state of constant change due to erosion. The Blackgang Chine on the Isle of Wight, for example, has been destroyed by landslides and coastal erosion during the 20th century. As t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill (ravine)
A gill or ghyll is a ravine or narrow valley in the Northern England, North of England and parts of Scotland. The word originates from the Old Norse . Examples include Dufton Ghyll Wood, Dungeon Ghyll, Troller's Gill and Trow Ghyll skeleton, Trow Ghyll. As a related usage, Gaping Gill is the name of a cave, not the associated stream, and Cowgill, Cumbria, Cowgill, Masongill and Halton Gill are derived names of villages. In South East England, the High Weald gills are deeply cut ravines, usually with a stream in the base which eroded the ravine. These gills may be up to deep, which represents a significant physiographic feature in lowland England. The stream flowing through a gill is often referred to as a beck: for example in Swaledale, Gunnerside Beck flows through Gunnerside Ghyll. ''Beck ''is also used as a more general term for streams in Yorkshire, Cumbria, south Durham and north Lancashire – examples include Aisgill, Ais Gill Beck, Arkle Beck and Peasey Beck. There are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barranco Del Infierno (Tenerife)
The Barranco del Infierno (in English: "Hell's Gorge") is a ravine located in the town of Adeje in the south of the island of Tenerife, Canary Islands, Spain. It is the second most-visited protected area on the island. A popular hiking trail leads through the ravine to the highest waterfall on Tenerife. Access to the gorge is controlled by a limitation of 300 daily visitors. It is not permitted to under-5s, and under-18s must be accompanied by an adult.Tenerife Top Tours (2020)''Rules'' Consulted 15 January 2023. Reservations can be dononline The trail was closed for security reasons after a deadly accident in 2009 and again on October 26 2015, but was reopened on February 10 2016. The biggest change of all is the compulsory wearing of crash helmets. Currently it is open all the way to the end, except on rainy and windy days, additional safety measures have been implemented. The path takes approximately three and a half hours, between the outward and return journey, and the total r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barranco De Badajoz
The Barranco de Badajoz or Chamoco is a ravine on the island of Tenerife (Canary Islands, Spain), in the province of Santa Cruz de Tenerife, part of the municipality of Güímar in the southeast of the island.Plan Hidrológico Fuente: Consejo Insular de Aguas de TenerifeInfraestructura de Datos Espaciales de Canarias Fuente: Consejería de Educación, Universidades y Sostenibilidad. Gobierno de Canarias Archeology The most significant prehistoric remains on the island were found in this area, demonstrating the aboriginal |
Bam Bam Amphitheaters
The Bam Bam Amphitheaters are large erosional ravines found in Wonga-Wongue Presidential Reserve in western Gabon. Although they are referred to as "cirques," they are unrelated to the glacial cirques of high latitudes and mountains. In Gabon, they are east-facing slopes cut into the Upper Cretaceous to Paleocene sandstones that dip westward beneath the Atlantic Ocean. Because the sandstones are higher and drier than the surrounding coastal plain, they are covered with grasslands rather than the prevailing tropical rain forest. As the sandstones are locally intensely colored, and because the steep slopes tend to be barren, the "cirques" locally appear to be "badlands Badlands are a type of dry terrain where softer sedimentary rocks and clay-rich soils have been extensively eroded."Badlands" in '' Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 2, p. 47. They are characterized by steep slopes, ..." similar to those of the American West.Horner, R. H., 1985, The G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gully
A gully is a landform A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). Landforms together make up a given terrain, and their arrangement ... created by running water, mass movement (geology), mass movement, or both, which erosion, erodes soil to a sharp angle, typically on a hillside or in river floodplains or Fluvial terrace, terraces. Gullies resemble large ditches or small valleys, but are metres to tens of metres in depth and width, are characterized by a distinct 'headscarp' or 'headwall' and progress by Headward erosion, headward (i.e., upstream) erosion. Gullies are commonly related to intermittent or ephemeral water flow, usually associated with localised intense or protracted rainfall events or snowmelt. Gullies can be formed and accelerated by cultivation practices on hillslopes (often gentle gradients) in Farmland (farming), farm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Badlands
Badlands are a type of dry terrain where softer sedimentary rocks and clay-rich soils have been extensively eroded."Badlands" in '' Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 2, p. 47. They are characterized by steep slopes, minimal vegetation, lack of a substantial regolith, and high drainage density.A.J. Parsons and A.D. Abrahams, Editors (2009) ''Geomorphology of Desert Environments'' (2nd ed.) Springer Science & Business Media Ravines, gullies, buttes, hoodoos and other such geologic forms are common in badlands. Badlands are found on every continent except Antarctica, being most common where there are unconsolidated sediments. They are often difficult to navigate by foot, and are unsuitable for agriculture. Most are a result of natural processes, but destruction of vegetation by overgrazing or pollution can produce anthropogenic badlands. Badlands topography Badlands are characterized by a distinctive badlands topography. This is terrain in whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentation
Sedimentation is the deposition of sediments. It takes place when particles in suspension settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the forces acting on them: these forces can be due to gravity, centrifugal acceleration, or electromagnetism. Settling is the falling of suspended particles through the liquid, whereas sedimentation is the final result of the settling process. In geology, sedimentation is the deposition of sediments which results in the formation of sedimentary rock. The term is broadly applied to the entire range of processes that result in the formation of sedimentary rock, from initial erosion through sediment transport and settling to the lithification of the sediments. However, the strict geological definition of sedimentation is the mechanical deposition of sediment particles from an initial suspension in air or water. Sedimentation may pertain to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shield Volcanoes
A shield volcano is a type of volcano named for its low profile, resembling a 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 active volcanoes on Earth, such as 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 and which had been cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
