|
List Of Sinkholes
The following is a list of sinkholes, blue holes, dolines, crown holes, cenotes, and pit caves. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. Some are caused by karst processes—for example, the chemical dissolution of carbonate rocks or suffosion processes. Sinkholes vary in size from both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide. 21st century sinkholes * 2007 Guatemala City sinkhole – a deep sinkhole which formed in Guatemala City in 2007, due to sewage pipe ruptures. * 2010 Guatemala City sinkhole – a disaster in which an area approximately across and deep collapsed in Guatemala City, swallowing a three-story factory. * 2012 Ottawa sinkhole – Regional Road 174 at the Jeanne D'Arc interchange on September 4, 2012. * 2014 Ottawa sinkhole – at the LRT tunnelling site at Waller Street, j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Blue Hole
The Great Blue Hole is a giant marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll from the mainland and Belize City. The hole is circular in shape, across and deep. It has a surface area of . It was formed during several episodes of quaternary glaciation The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing. Although geologists describe ... when sea levels were much Last glacial period, lower. Analysis of stalactites found in the Great Blue Hole shows that formation took place 153,000, 66,000, 60,000, and 15,000 years ago. As the ocean began to rise again, the cave was flooded. The Great Blue Hole is a part of the larger Belize Barrier Reef, Belize Barrier Reef Reserve System, a UNESCO World Heritage Site. Exploration The site was made famous by Jacques Cousteau, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2016 Ottawa Sinkhole
Rideau Street (french: Rue Rideau) is a major street in downtown Ottawa, Ontario, Canada and one of Ottawa's oldest and most famous streets running from Wellington Street in the west to Montreal Road in the east where it connects to the Vanier district. Rideau Street is home to the Château Laurier, the CF Rideau Centre and the Government Conference Centre (Ottawa's former central train station). Along with Wellington Street and Sussex Drive it was among the first streets in Ottawa to be host to businesses; it was created with the founding of the early town. The Plaza Bridge by the Rideau Canal is at its westmost point and the Cummings Bridge is at its eastmost point. For many years, Rideau Street was one of Ottawa's primary retail thoroughfares, containing department stores such as Freimans, Ogilvy's, Woolworth, Caplan's and Metropolitan. In November 1979, then mayor Marion Dewar examined a plan to create what became the 'Rideau Street Bus Mall.' Sidewalks from Sussex t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Koonalda Cave
Koonalda Cave is a cave in the Australian state of South Australia, on the Nullarbor Plain in the locality of Nullarbor. It is notable as an archeological site."Koonalda Cave" '''' I.D. Lewis described the cave in 1976 as: Large doline 60m in diam. and 25m deep; talus slope to two main large passages connected by a high window; total length of cave 1200m; three lakes at -80m; narrow airspace beyond third lake leads to 45m diam. dome and lake; another 30m sump leads off this...Thousands of square metres in the cave are covered in parallel finger-marked geometric lines and patterns, |
Kilsby Sinkhole
The Kilsby sinkhole is a sinkhole located near Mount Gambier in South Australia. Since the late 1960s, the naturally occurring karst sinkhole has been used for recreational diving as well as civilian and police diver training. History The sinkhole is located on private property owned by the Kilsby family since the late 19th century. Due to insurance and liability concerns, access to the site is highly controlled. Some commercial dive companies teach diving at the site, and limited independent recreational diving and snorkelling is allowed. In the late 1960s cave and sinkhole diving gained popularity in the area, leading to frequent dives of inexperienced divers at the Kilsby sinkhole. On April 6, 1969, two such inexperienced divers died at the Kilsby sinkhole. Later that year, and until at least 1983, the Australian Department of Defence took on an exclusive lease on the sinkhole and did not allow public access or recreational diving. In the 1970s the site was used to test the B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Cave
Fossil Cave (5L81), formerly known as The Green Waterhole, is a cave in the Limestone Coast region of south-eastern South Australia. It is located in the gazetted locality of Tantanoola about north-west of the city of Mount Gambier, only a few metres from the Princes Highway (Route B1) between Mount Gambier and Millicent. It is popular with cave divers and is notable for being both a unique paleontological site and the "type locality" for very rare crustaceans (syncarids - Koonunga sp.) which to date have been found only in caves and Blue Lake in the Mount Gambier region. Description and naming The cave is formed in 30-million-year-old Oligocene coralline limestone. The cave is a karst sinkhole and is largely filled with water. The surface depression is about long and wide. Beneath the surface it extends to a maximum length of and a width of . The name of the cave was changed on 23 April 1989 by the Government of South Australia from ''The Green Waterhole'' to ''Fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ewens Ponds
Ewens Ponds is a series of three water-filled limestone sinkholes in the Australian state of South Australia located in the gazetted locality of Eight Mile Creek, on the watercourse of Eight Mile Creek about south of Mount Gambier and east of Port Macdonnell. The ponds are popular with recreational divers due to underwater visibility of up to . It has a large fish population including the endangered golden pygmy perch. Ewens Ponds has been part of the Ewens Ponds Conservation Park since 1976. History The original inhabitants of the land are the Boandik group, of the Bungandidj people of Aboriginal people who lived in what is now south-eastern South Australia. The first European identified with the area was Thomas Ewens, whose dog chased a kangaroo into one of the ponds while he was hunting geese. Ewens reported his discovery of the ponds to the survey department and they became known as Thomas Ewens Spring Ponds. The land surrounding the ponds was gradually cleared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tierra Amarilla, Chile
Tierra Amarilla is a Chilean commune and city in Copiapó Province, Atacama Region. According to the 2012 census, the commune population was 12,898 and has an area of 11,191 km². Demographics According to the 2002 census of the National Statistics Institute, Tierra Amarilla had 12,888 inhabitants (7,277 men and 5,611 women). Of these, 8,578 (66.6%) lived in urban areas and 4,310 (33.4%) in rural areas. The population grew by 9.9% (1,164 persons) between the 1992 and 2002 censuses. Administration As a commune, Tierra Amarilla is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years. Within the electoral divisions of Chile, Tierra Amarilla is represented in the Chamber of Deputies by Alberto Robles ( PRSD) and Giovanni Calderón (UDI) as part of the 6th electoral district, (together with Caldera, Vallenar, Freirina, Huasco and Alto del Carmen). The commune is represented in the Sen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surabaya
Surabaya ( jv, ꦱꦸꦫꦧꦪ or jv, ꦯꦹꦫꦨꦪ; ; ) is the capital city of the Provinces of Indonesia, Indonesian province of East Java and the List of Indonesian cities by population, second-largest city in Indonesia, after Jakarta. Located on the northeastern border of Java island, on the Madura Strait, it is one of the earliest port cities in Southeast Asia. According to the Government of Indonesia, National Development Planning Agency, Surabaya is one of the Regions of Indonesia#Development regions, four main central cities of Indonesia, alongside Jakarta, Medan, and Makassar. The city has a population of 2.87 million within its city limits at the 2020 census and 9.5 million in the extended Surabaya metropolitan area, making it the List of metropolitan areas in Indonesia, second-largest metropolitan area in Indonesia. The city was settled in the 10th century by the Janggala, Kingdom of Janggala, one of the two Javanese kingdoms that was formed in 1045 when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2016 Ruijin Sinkhole
Ruijin () is a county-level city of Ganzhou in the mountains bordering Fujian Province in the south-eastern part of Jiangxi Province. Formerly a county, Ruijin became a county-level city on May 18, 1994. It was an early center of Chinese communist activity. In the late-1920s, the Republic of China (ROC) forced the Communists out of the Jinggang Mountains. The Communists fled to Ruijin and the safety of its relative isolation in the rugged mountains along Jiangxi-Fujian border. In 1931, Mao Zedong founded the Chinese Soviet Republic (CSR) with Ruijin as its capital; it was called Ruijing by the CSR. The Communist left in 1934 on the Long March after being surrounded again by the ROC. During the Cultural Revolution, the Ruijin Massacre in September and October 1968 killed over 300 people in the county. Ruijin is a popular destination for red tourism and ecotourism. It is a pilgrimage for Maoists from China and around the globe. Administrative divisions Ruijin City has 7 towns an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Surabaya")