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Mittagong Formation
The Mittagong Formation is a sedimentary rock unit in the Sydney Basin in eastern Australia. Formation Laid down in the Triassic Period, it may be seen as an interval of interbedded fine-grained sandstone and shale between the Ashfield Shale (above) and the Hawkesbury sandstone (below). The maximum thickness around Sydney may be ten metres. Near Town Hall railway station, the formation is 8 metres thick. In the type area at Mittagong it is 15 metres thick. Whereabouts In northern Sydney it can be seen in several areas, such as West Pymble and Mount Ku-ring-gai. This rock formation is associated with the critically endangered Sydney Turpentine-Ironbark Forest. See also *Narrabeen group The Narrabeen group of sedimentary rocks occurs in the Sydney Basin in eastern Australia. This series of rocks was formed in the Triassic Period. Geology It includes various rock types including lithic sandstone, quartz sandstone, siltstones, ... References Geologic formations of Aust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Ku-ring-gai
Mount Kuring-gai is an outer suburb of Northern Sydney, in the state of New South Wales, Australia. Mount Kuring-gai is located 31 kilometres north-west of the Sydney central business district, in the local government area of Hornsby Shire. History The name "Kuring-gai" derives from the Guringai Aboriginal people who were thought to be the Traditional Owners of the area. More contemporary research suggests that this was not the case. The railway station opened on 5 October 1901 and was named Kuring-gai. The current station was constructed in 1909. The ''Mount'' was added to the name on 1 August 1904. ''Kuring-gai'' Post Office opened on 27 January 1908 and was similarly renamed ''Mount Kuring-gai'' in 1933. Mount Kuring-gai Public School opened in 1957. Population In the 2016 Census, there were 1,708 people in Mount Kuring-Gai. 73.9% of people were born in Australia and 83.0% of people spoke only English at home. The most common responses for religion were No Religion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sydney
Sydney ( ) is the capital city of the state of New South Wales, and the most populous city in both Australia and Oceania. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about towards the Blue Mountains to the west, Hawkesbury to the north, the Royal National Park to the south and Macarthur to the south-west. Sydney is made up of 658 suburbs, spread across 33 local government areas. Residents of the city are known as "Sydneysiders". The 2021 census recorded the population of Greater Sydney as 5,231,150, meaning the city is home to approximately 66% of the state's population. Estimated resident population, 30 June 2017. Nicknames of the city include the 'Emerald City' and the 'Harbour City'. Aboriginal Australians have inhabited the Greater Sydney region for at least 30,000 years, and Aboriginal engravings and cultural sites are common throughout Greater Sydney. The traditional custodians of the land on which modern Sydney stands are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone Formations
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topography, topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porosity, porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic Australia
The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the chief terrestrial vertebrates during this time. A specialized subgroup of arch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Formations Of Australia
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Narrabeen Group
The Narrabeen group of sedimentary rocks occurs in the Sydney Basin in eastern Australia. This series of rocks was formed in the Triassic Period. Geology It includes various rock types including lithic sandstone, quartz sandstone, siltstones, claystones, conglomerate (geology), conglomerate and shales, some of which have fossils of plants and fish. Partly in these rocks plants, fish and amphibious animals are petrified. The red and green shales of the Narrabeen Group are water-tight over the sandstone bodies and the shale of Bald Hill (Australia), Bald Hill, which forms the top layer of the Narrabeen Group, forms a regional water-barrier layer. Over the Narrabeen Group, the younger stratigraphic formation of Hawkesbury sandstones accumulated. Structure Above the Narrabeen group is the younger less fertile Hawkesbury sandstone. Below are Permian sedimentary rocks including measures of coal broadly known as the Illawarra Coal Measures. Whereabouts The Narrabeen group is most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sydney Turpentine-Ironbark Forest
The Sydney Turpentine-Ironbark Forest (STIF) is dry sclerophyll forest community of Sydney, New South Wales, Australia, that is typically found in the Inner West and Northern region of Sydney. It is also among the three of these plant communities which have been classified as Endangered, under the New South Wales government's ''Threatened Species Conservation Act 1995'', with only around 0.5% of its original pre-settlement range remaining. As of 26 August 2005, the Australian Government reclassified Sydney Turpentine-Ironbark Forest as a "Critically Endangered Ecological Community", under the Commonwealth's ''Environment Protection and Biodiversity Conservation Act 1999''. The original extent of the forest was 26,516 ha, but now only 1,182 ha (or 4.5% of original extent) remains. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Pymble
West Pymble is a suburb on the Upper North Shore of Sydney in the state of New South Wales, Australia north-west of the Sydney Central Business District in the local government area of Ku-ring-gai Council. Pymble is a separate suburb to the east, sharing the postcode of 2073. History The land on which West Pymble was built was Guringai country, until European arrival brought disease which greatly reduced the population. By 1824, Aboriginal people in the area had been reduced to 'the remains of an Aboriginal tribe', who periodically walked through the area on their way from Bobbin Head to Pymble Hill. Early European settler Robert Pymble told his grandchildren that the Aboriginal people had gone by 1856. Logging was the first industry of the area, with both government logging camps and private contractors felling the biggest trees and dragging them to the Lane Cove River or local sawpits. The Lofberg family, who were established in the area by the 1860s, shipped lumber to the S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Town Hall Railway Station, Sydney
Town Hall railway station is a heritage-listed underground commuter rail station located in the centre of the Sydney central business district in New South Wales, Australia. The station opened on 28 February 1932. It is named after the Sydney Town Hall, located directly above the station. History The station is built on the site of Sydney's earliest colonial cemetery, the Old Sydney Burial Ground. In 2008, part of this cemetery was being excavated from under the Town Hall. The station opened on 28 February 1932 and was built with six platforms, which were split over two levels with three platforms on each level. When the station opened, only four of the platforms were in use: platforms 1, 2 and 3 on the upper level and platform 6, served by escalators, on the lower level. The other two platforms were built in preparation for a proposed western suburbs line from the city to Gladesville, as envisaged under the Bradfield scheme. This line was never built, and the platforms (4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, smaller islands. With an area of , Australia is the largest country by area in Oceania and the world's List of countries and dependencies by area, sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a Megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and climates, with Deserts of Australia, deserts in the centre, tropical Forests of Australia, rainforests in the north-east, and List of mountains in Australia, mountain ranges in the south-east. The ancestors of Aboriginal Australians began arriving from south east Asia approximately Early human migrations#Nearby Oceania, 65,000 years ago, during the Last Glacial Period, last i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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