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Natural Arch
A natural arch, natural bridge, or (less commonly) rock arch is a natural landform where an arch has formed with an opening underneath. Natural arches commonly form where inland cliffs, Cliffed coast, coastal cliffs, Fin (geology), fins or Stack (geology), stacks are subject to erosion from the sea, rivers or weathering (subaerial processes). Most natural arches are formed from narrow fins and sea stacks composed of sandstone or limestone with steep, often vertical, cliff faces. The formations become narrower due to erosion over geologic time scales. The softer rock stratum erodes away creating rock shelters, or alcoves, on opposite sides of the formation beneath the relatively harder stratum, or caprock, above it. The alcoves erode further into the formation eventually meeting underneath the harder caprock layer, thus creating an arch. The erosional processes exploit weaknesses in the softer rock layers making cracks larger and removing material more quickly than the caprock; ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delicate Arch LaSalle
Delicate may refer to: Music * Delicate (album), ''Delicate'' (album), by Martha & The Muffins (2010) * Delicate (Taylor Swift song), "Delicate" (Taylor Swift song), song by Taylor Swift from ''Reputation'' (2017) * Delicate (Terence Trent D'Arby song), "Delicate" (Terence Trent D'Arby song), by Terence Trent D'Arby featuring Des'ree from ''Symphony or Damn'' (1993) * "Delicate", song by D. Rice from ''O (Damien Rice album), O'' (2002) * "Delicate", song by Operator from Soulcrusher (Operator album), ''Soulcrusher'' (2007) Other uses * Delicates, garments that include List of delicate fabrics, delicate fabrics * Delicacy, Delicacies * ''Mythimna vitellina'' (the delicate), a moth of the family Noctuidae * American Horror Story: Delicate {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xianren Bridge
Xianren Bridge () is a natural arch created by flowing water that has the world's longest recorded span. Carved of limestone karst, the formation bridges Buliu River in the northern Guangxi Zhuang Autonomous Region, China. Because of its remote location, accessible only by a three-hour rafting trip, it was not discovered until 2009 and remains relatively obscure. An expedition in October 2010 by the ''Natural Arch and Bridge Society'' first measured the bridge's span and found it to be in length.Jett, Stephen China Diary The Natural Arch and Bridge Society See also * List of longest natural arches This list of longest natural arches ranks the world's natural arches by the length of their span as defined and measured by the Natural Arch and Bridge Society (NABS). As a disclaimer, the NABS states that the information in this list, and therefo ... References External links Drone footage {{10Arches Natural arches of China Landforms of Guangxi Rock formations of China ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stair Hole
Stair Hole is a small cove located just west of Lulworth Cove in Dorset, southern England. The Fold (geology), folded limestone stratum, strata known as the ''Lulworth crumple'' are particularly visible at Stair Hole. There are several caves visible from the seaward side of Stair Hole; Cathedral Cavern is supported by pillars of rock rising out of the water.Hammond, R. J. W., ''Dorset Coast'', Ward Lock Ltd, 1979, p149 The rock structure was created during the Alpine orogeny and exposed by subsequent erosion. Stair Hole featured in ''Nuts in May (Play for Today), Nuts in May'', a Play for Today directed by Mike Leigh, and in Five on a Treasure Island (film), ''Five on a Treasure Island'', a 1957 film serial by the Children's Film Foundation and was the background for the climactic sword fight between George Baker (British actor), George Baker and Peter Arne in ''The Moonraker'' (1957). Gallery File:E end of Stair Hole, Lulworth, England arp.jpg, East end of the Lulworth Crumpl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Durdle Door
Durdle Door (sometimes written Durdle Dor) is a natural limestone arch on the Jurassic Coast near Lulworth in Dorset, England.West, I.W., 2003.Durdle Door; Geology of the Dorset Coast". Southampton University, UK. Version H.07.09.03. It is privately owned by the Weld family, who own the Lulworth Estate, but it is also open to the public. Geology The form of the coastline around Durdle Door is controlled by its geology—both by the contrasting hardnesses of the rocks, and by the local patterns of faults and folds.Nowell, D. A. G. "The geology of Lulworth Cove, Dorset." Geology Today 14 (1998): 71–74. The arch has formed on a concordant coastline where bands of rock run parallel to the shoreline. The rock strata are almost vertical, and the bands of rock are quite narrow. Originally a band of resistant Portland limestone ran along the shore, the same band that appears one mile along the coast forming the narrow entrance to Lulworth Cove. Behind this is a band of wea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.Blatt, Harvey and Robert J. Tracy (1996) ''Petrology: Igneous, Sedimentary and Metamorphic'', 2nd ed., Freeman, pp. 281–292 Shale is characterized by its tendency to split into thin layers (Lamination (geology), laminae) less than one centimeter in thickness. This property is called ''Fissility (geology), fissility''. Shale is the most common sedimentary rock. The term ''shale'' is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the narrower sense of clay-rich fissile mudrock. Texture Shale typically exhibits varying degrees of fissility. Because of the parallel orientation of clay mineral flakes in shale, it breaks in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concordant Coastline
In coastal geography, a concordant, longitudinal, or Pacific type coastline occurs where beds, or layers, of differing rock types are folded into ridges that run parallel to the coast. The outer hard rock (for example, granite) provides a protective barrier to erosion of the softer rocks (for example, clays) further inland. Sometimes the outer hard rock is punctured, allowing the sea to erode the softer rocks behind. This creates a cove, a circular area of water with a relatively narrow entrance from the sea. Lulworth Cove in Dorset is situated on a concordant coastline. The outer hard rock is Portland limestone. The sea has broken through this barrier and easily eroded the clays behind it. A chalk cliff face at the back of the cove slows further erosion. Erosion is just starting to the west, where the sea has again broken through the Portland limestone barrier at Stair Hole. The concordant coast may take one of two landform types. The Dalmatian type, named from Dalmatia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andaman Islands
The Andaman Islands () are an archipelago, made up of 200 islands, in the northeastern Indian Ocean about southwest off the coasts of Myanmar's Ayeyarwady Region. Together with the Nicobar Islands to their south, the Andamans serve as a maritime boundary between the Bay of Bengal to the west and the Andaman Sea to the east. Most of the islands are part of the Andaman and Nicobar Islands, a Union Territory of India, while the Coco Islands and Preparis Island are part of the Yangon Region of Myanmar. The Andaman Islands are home to the Andamanese peoples, Andamanese, a group of indigenous people made up of a number of tribes, including the Jarawas (Andaman Islands), Jarawa and Sentinelese. While some of the islands can be visited with permits, entry to others, including North Sentinel Island, is banned by law. The Sentinelese are generally hostile to visitors and have had Uncontacted peoples, little contact with any other people. The Indian government and coast guard protect th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neill Island
Neil Island, officially known as Shaheed Dweep (), is an island of the Andaman Islands, located in Ritchie's Archipelago. It belongs to the South Andaman administrative district, part of the Indian union territory of Andaman and Nicobar Islands. The island is located northeast from Port Blair. Etymology Neil Island was named after British Brigadier general James Neill, who had fought on the side of the British East Indian company in the Sepoy Mutiny of 1857. In December 2018, it was renamed as Shaheed Dweep as a tribute to Netaji Subhas Chandra Bose. Bose had hoisted the Indian flag at Port Blair on 30 December 1943 and proclaimed the Andaman and Nicobar Islands as territories liberated from British rule. He had subsequently named Andaman Island as Shaheed and Nicobar Island as Swaraj. History Shaheed Dweep, then Neil Island, was uninhabited until the arrival of settlers in the late 1960s. Like Swaraj Dweep, then Havelock, the vast majority of settlers at Shaheed Dweep wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victoria (Australia)
Victoria, commonly abbreviated as Vic, is a States and territories of Australia, state in southeastern Australia. It is the second-smallest state (after Tasmania), with a land area of ; the second-most-populated state (after New South Wales), with a population of over 7 million; and the most densely populated state in Australia (30.6 per km2). Victoria's economy is the List of Australian states and territories by gross state product, second-largest among Australian states and is highly diversified, with service sectors predominating. Victoria is bordered by New South Wales to the north and South Australia to the west and is bounded by the Bass Strait to the south (with the exception of a small land border with Tasmania located along Boundary Islet), the Southern Ocean to the southwest, and the Tasman Sea (a marginal sea of the South Pacific Ocean) to the southeast. The state encompasses a range of climates and geographical features from its temperate climate, temperate coa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Bridge (Victoria)
London Bridge is an offshore natural arch in the Port Campbell National Park, Australia. The arch is a significant tourist attraction along the Great Ocean Road near Port Campbell in Victoria (Australia), Victoria. The stack (geology), stack was formed by a gradual process of erosion, and until 1990 formed a complete double-span natural bridge. The span closer to the shoreline, London Bridge Is Falling Down, sparked comparisons with this nursery rhyme and collapsed unexpectedly on 15 January 1990, leaving two tourists (Kelli Harrison and David Darrington) stranded on the outer span before being rescued by police helicopter. No one was injured in the event. See also *The Twelve Apostles, Victoria *Loch Ard Gorge *The Gibson Steps *The Grotto, Victoria, The Grotto *Percé Rock in Canada, another double arch where one collapsed References External links Official Website for 12 Apostles Region of Victoria [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave
Caves or caverns are natural voids under the Earth's Planetary surface, 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, ''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 sedime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wave
In physics, mathematics, engineering, and related fields, a wave is a propagating dynamic disturbance (change from List of types of equilibrium, equilibrium) of one or more quantities. ''Periodic waves'' oscillate repeatedly about an equilibrium (resting) value at some frequency. When the entire waveform moves in one direction, it is said to be a travelling wave; by contrast, a pair of superposition principle, superimposed periodic waves traveling in opposite directions makes a ''standing wave''. In a standing wave, the amplitude of vibration has nulls at some positions where the wave amplitude appears smaller or even zero. There are two types of waves that are most commonly studied in classical physics: mechanical waves and electromagnetic waves. In a mechanical wave, Stress (mechanics), stress and Strain (mechanics), strain fields oscillate about a mechanical equilibrium. A mechanical wave is a local deformation (physics), deformation (strain) in some physical medium that propa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
