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List Of Sinkholes
The following is a list of sinkholes, blue holes, Sinkhole, 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 topography, karst processes—for example, the chemical dissolution of carbonate rocks or suffosion processes. Sinkholes can 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. Australia * Ewens Ponds – series of three water-filled limestone sinkholes on Eight Mile Creek south of Mount Gambier and east of Port MacDonnell, South Australia. * Fossil Cave – The cave is a karst sinkhole and is largely filled with water. *Kilsby sinkhole – in Mount Gambier, Southern Australia. * Koonalda Cave – a cave located in the Nullarbor Plain in South Australia. * Little Blue Lake – water-filled doline located near Mount Sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Blue Hole
The Great Blue Hole is a large Blue hole, 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 phases of the Quaternary glaciation 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, who declared it one of the top five scuba diving sites in the world. In 1971 he brought his ship, the ''RV Calypso, Calypso'', to the hole to chart its depths. Investigations by this expedition confirmed the hole's origin as typical karst lim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nullarbor Plain
The Nullarbor Plain ( ; Latin: feminine of 'no' and 'tree') is part of the area of flat, almost treeless, arid or semi-arid country of southern Australia, located on the Great Australian Bight coast with the Great Victoria Desert to its north. It is the world's largest single exposure of limestone bedrock, and occupies an area of about . At its widest point, it stretches about from east to west across the border between South Australia and Western Australia. History Historically, the Nullarbor was seasonally occupied by Indigenous Australian people, the Mirning clans and Yinyila people. Traditionally, the area was called ''Oondiri'', which is said to mean 'the waterless'. The first Europeans known to have sighted and mapped the Nullarbor coast were Captain François Thijssen and Councillor of the Indies, Pieter Nuyts, on the Dutch East Indiaman '''t Gulden Zeepaert (ship, 1626), 't Gulden Zeepaert'' (the Golden Seahorse). In 1626–1627, they charted a stretch of the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Line 1 (O-Train)
Line 1 (), also known as the Confederation Line (), is a light rail line operated by OC Transpo in Ottawa, Ontario, Canada, part of the city's O-Train system. It opened on September 14, 2019, and is O-Train's second line. It operates on an east–west route, with a segment under Queen Street in the downtown core, complementing the north–south Line 2 (O-Train), Line 2 that operates to the west of the downtown core. Despite using light rail rolling stock and technology (e.g. pantograph electrical pickup from Overhead line, overhead catenary rather than a third rail), Line 1 is completely grade separated. The project was approved by the Ottawa City Council and the contract was awarded in December 2012. Construction began in 2013. At a cost of just over , the first stage of the line was the largest infrastructure project awarded in the history of the city before being surpassed by the Stage 2 extension of the line, which was projected to cost $4.66billion.Schepers (December 4, 201 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2012 Ottawa Sinkhole
Ottawa Road 174, formerly Ottawa-Carleton Regional Road 174 and commonly referred to as Highway 174, is a municipal expressway and List of numbered roads in Ottawa, numbered road in the City of Ottawa which serves the eastern suburbs of Orléans, Ontario, Orléans and Cumberland, Ontario, Cumberland. The four-lane freeway segment between Highway 417/Aviation Parkway junction to Trim Road (Ottawa Road57) is also known as the Queensway, in addition the ''Queensway'' name continues to be applied to Highway417 west of that intersection. Although the road continues through the towns of Rockland, Ontario, Rockland and Hawkesbury, Ontario, Hawkesbury to the Quebec border, the portion east of the Ottawa city boundary is known as Prescott and Russell County Road17. Originally the alignment of Ontario Highway 17, Highway 17, which was the route of the Trans-Canada Highway between Ottawa and the Quebec border, Regional Road174 (as it was then designated) was created on April1, 1997 when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartzite
Quartzite is a hard, non- foliated metamorphic rock that was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts, and hence quartzite is a metasandstone. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and red due to varying amounts of hematite. Other colors, such as yellow, green, blue and orange, are due to other minerals. The term ''quartzite'' is also sometimes used for very hard but unmetamorphosed sandstones that are composed of quartz grains thoroughly cemented with additional quartz. Such sedimentary rock has come to be described as orthoquartzite to distinguish it from metamorphic quartzite, which is sometimes called metaquartzite to emphasize its metamorphic origins. Quartzite is very resistant to chemical weathering and often forms ridges and resist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mariana, Minas Gerais
Mariana is the oldest city in the state of Minas Gerais, Brazil. It is a tourist city, founded on July 16, 1696, and retains the characteristics of a baroque city, with its churches, buildings and museums. It was the first capital of Minas Gerais. Other historical cities in Minas Gerais are Ouro Preto, São João del-Rei, Diamantina, Tiradentes, Congonhas and Sabará. It has an area of . The municipality contains a very small part of the of Serra do Gandarela National Park, created in 2014. In 2015, it suffered a major dam disaster. See also * List of municipalities in Minas Gerais This is a list of the municipalities in the States of Brazil, state of Minas Gerais, Minas Gerais (MG), located in the Southeast Region, Brazil, Southeast Region of Brazil. Minas Gerais is divided into 853 Municipalities of Brazil, municipalities, ... References External links Municipalities in Minas Gerais Populated places established in 1696 1696 establishments in the Portug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gruta Do Centenário
Gruta do Centenário ( English: ''Centenary grotto'') (MG-1081), is a cave located in the municipality of Mariana, in the state of Minas Gerais, Brazil. It is the largest and deepest quartzite cave in the world, and second in the country in terms of unevenness. Other caves which are part of the same system have now been partially explored. History The beginnings of the Brazilian speleology in the eighteenth and nineteenth century mingle with the history of Caraça. From 1818 reports of two European naturalists, Johann Baptist von Spix and Carl Friedrich Philipp von Martius Carl Friedrich Philipp (Karl Friedrich Philipp) von Martius (17 April 1794 – 13 December 1868) was a German botany, botanist and explorer. Between 1817 and 1820, he travelled 10,000 km through Brazil while collecting botanical specimens. His m ..., cited the existence of several caves in the Serra do Caraça. About this place, it is said that in 1922 the priests of the Caraça College had discovered at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goiás
Goiás () is a Brazilian States of Brazil, state located in the Central-West Region, Brazil, Central-West region. Goiás borders the Federal District (Brazil), Federal District and the states of (from north clockwise) Tocantins, Bahia, Minas Gerais, Mato Grosso do Sul and Mato Grosso. The state capital is Goiânia. With 7.2 million inhabitants, Goiás is the most populous state in the Central-West region and the List of Brazilian states by population, 11th most populous in the country. It has the List of Brazilian federative units by gross regional product, ninth largest economy among Brazilian federative units. In Brazil's geoeconomic division, Goiás belongs to the Centro-Sul (Center-South), being the northernmost state of the southern portion of Brazil. The state has 3.3% of the Brazilian population and is responsible for 2.7% of the Brazilian GDP. The history of Goiás dates back to the beginning of the 18th century, with the arrival of pioneers from São Paulo. The Rio Verm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buraco Das Araras (Goiás)
Buraco das Araras - Dolina dos Maracanas (BR-020) ( English: Hole of the Macaws) is one of the largest quartzitic caves located in the State of Goiás, Brazil. It is located about west of Brasília and from the district of Bezerra, in the municipality of Formosa. It is considered one of the largest sinkholes (dolinas) in the world. Description Discovered in 1912, it is believed that the hole has been formed by the collapse of the roof of a cave. The cave itself is deep and wide, having in its midst a dense rainforest with gigantic ferns typical of a primitive age. Getting there To reach it the traveler must travel from Formosa, following BR-020 north as far as the village of Bezerra. Four kilometers after the settlement, one should turn left and drive on a dirt road for and then turn left for two more kilometers. See also * List of caves in Brazil ** Gruta do Centenário Gruta do Centenário ( English: ''Centenary grotto'') (MG-1081), is a cave located in the munici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piccaninnie Ponds Conservation Park
Piccaninnie Ponds Conservation Park, formerly the Piccaninnie Ponds National Park, is a protected area of located in southeastern South Australia near Mount Gambier. Description The Piccaninnie Ponds Conservation Park is located in the south-east of South Australia in the gazetted locality of Wye on the continental coastline overlooking Discovery Bay about southeast of the state capital of Adelaide and south-east of the city of Mount Gambier. The conservation park conserves a wetland fed by freshwater springs in a karst landscape. It is close to the border with Victoria and is part of the Discovery Bay to Piccaninnie Ponds Important Bird Area, identified by BirdLife International as being of global significance for several bird species. It is a listed Ramsar site. The park contains a walking track through coastal woodland to a viewing platform overlooking the wetlands. Recreational diving Piccaninnie Ponds is a popular site for both snorkelling and cave diving. In 1964� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the Northern Territory looks out to the Timor Sea, the Arafura Sea, and the Gulf of Carpentaria, including Western New Guinea and various other islands of the Indonesian archipelago. The NT covers , making it the third-largest Australian federal division, and List of country subdivisions by area, the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 249,000 – fewer than half the population of Tasmania. The largest population centre is the capital city of Darw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Borroloola
Borroloola () is a town in the Northern Territory of Australia. It is located on the McArthur River, about upstream from the Gulf of Carpentaria. Location Borroloola lies on the traditional country of the Yanyuwa people, on the coastal plain between the Barkly Tablelands and the Gulf of Carpentaria. Rivers that run from the Tablelands escarpment to the Gulf regularly flood in the wet season, making travel on the unsealed section of Highway 1 (Australia), Highway One along the coastal plain to Queensland impossible. The rivers of this region have carved spectacular gorges through sandstone deposits in their upper reaches. The rivers and coastal areas are host to barramundi, earning Borroloola a reputation among sports fisherman, and also to the deadly saltwater crocodile. The region has little rain from May to September and is characterised by lightly treed Savanna grasslands. History Garawa language, Garrwa (also known as Garawa) is a language of the Gulf region, taking in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
