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Mount Desire Dyke
Mount Desire Dyke is designated place of geological significance. It is located north-east of Hawker in South Australia, on the edge of the Flinders Ranges. The dyke (or dike) is a rock structure where mobile material, being a breccia of rock salt and rubble (as in 'salt diapirs') has intruded into cracks in folded Adelaidean sediments in the geological past PhD thesis of Trev J Mount, 1975, on "Diapirs and diapirism in the Adelaide Geosyncline" (Flinders Ranges) now is published online (free download) by the Department of Energy & Mining (Geological Survey of South Australia) as Report Book 2021/00006 The site was added to the South Australian Heritage Register on 30 March 1998. Its significance is described as follows: This site contains a number of features of considerable importance to research and debate concerning the nature and origin of the Mt Desire Dyke and other diapirs of the Flinders Ranges, including: typical dolomitic-vanished evaporite breccia and dolostone/metase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawker, South Australia
Hawker is a town and a locality in the Flinders Ranges area of South Australia, north of Adelaide. It is in the Flinders Ranges Council, the state Electoral district of Stuart and the federal Division of Grey. At the 2016 census, the locality had a population of 341 of which 237 lived in its town centre. History The town was surveyed during March 1880 and was proclaimed on 1 July 1880. It was named after G. C. Hawker who was a member of the South Australian Parliament for the years 1858–1865 and 1875–1883. The locality's boundaries were gazetted on 25 November 1999 and include the Government Towns of Wonoka, Hawker and Chapmanton. Portions of Hawker were added to the adjoining localities of Flinders Ranges and Shaggy Ridge on 26 November 2013. Hawker was a thriving railway town from the 1880s until 1956 as it was on the Central Australia Railway, until the route was moved further west when the Marree railway line was opened. Establishment and naming The State Library o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australia
South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories by area, and second smallest state by population. It has a total of 1.8 million people. Its population is the second most highly centralised in Australia, after Western Australia, with more than 77 percent of South Australians living in the capital Adelaide, or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 33,233. South Australia shares borders with all of the other mainland states, as well as the Northern Territory; it is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, to the south-east by Victoria, and to the south by the Great Australian Bight.M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flinders Ranges
The Flinders Ranges are the largest mountain range in South Australia, which starts about north of Adelaide. The ranges stretch for over from Port Pirie to Lake Callabonna. The Adnyamathanha people are the Aboriginal group who have inhabited the range for tens of thousands of years. Its most well-known landmark is Wilpena Pound / Ikara, a formation that creates a natural amphitheatre covering and containing the range's highest peak, St Mary Peak (). The ranges include several national parks, the largest being the Ikara-Flinders Ranges National Park, as well as other protected areas. It is an area of great geological and palaeontological significance, and includes the oldest fossil evidence of animal life was discovered. The Ediacaran Period and Ediacaran biota take their name from the Ediacara Hills within the ranges. In August 2022, a nomination for the Flinders Ranges to be named a World Heritage Site was lodged. History The first humans to inhabit the Flinders ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dike (geology)
A dike or dyke, in Geology, geological usage, is a sheet of rock that is formed in a Fracture (geology), fracture of a pre-existing rock body. Dikes can be either Intrusive rock, magmatic or Sedimentary rock, sedimentary in origin. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. Clastic dikes are formed when sediment fills a pre-existing crack.Essentials of Geology, 3rd Ed, Stephen Marshak Magmatic dikes A magmatic dike is a sheet of igneous rock that cuts across older rock beds. It is formed when magma fills a fracture in the older beds and then cools and solidifies. The dike rock is usually more resistant to weathering than the surrounding rock, so that erosion exposes the dike as a natural wall or ridge. It is from these natural walls that dikes get their name. Dikes preserve a record of the fissures through which most mafic magma (fluid magma low in silica) reac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australian Heritage Register
The South Australian Heritage Register, also known as the SA Heritage Register, is a statutory register of historic places in South Australia. It extends legal protection regarding demolition and development under the ''Heritage Places Act 1993''. It is administered by the South Australian Heritage Council. As a result of the progressive abolition of the Register of the National Estate The Register of the National Estate was a heritage register that listed natural and cultural heritage places in Australia that was closed in 2007. Phasing out began in 2003, when the Australian National Heritage List and the Commonwealth Heritag ... during the 2000s and the devolution of responsibility for state-significant heritage to state governments, it is now the primary statutory protection for state-level heritage in South Australia. References External linksOnline Heritage Databases {{Heritage registers of Australia Heritage registers in Australia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of South Australia
South Australia is an Australian state, situated in the southern central part of the country, and featuring some low-lying mountain ranges, the most significant being the Mount Lofty Ranges, which extend into the state's capital city, Adelaide, which comprises most of the state's population. Adelaide is situated on the eastern shores of Gulf St Vincent, on the Adelaide Plains, north of the Fleurieu Peninsula, between Gulf St Vincent and the low-lying Mount Lofty Ranges. The state of South Australia, which stretches along the coast of the continent and has boundaries with every other state in Australia, with the exception of the Australian Capital Territory and Tasmania. The Western Australia border has a history with South Australia, involving the South Australian Government Astronomer, Dodwell and the Western Australian Government Astronomer, Curlewis in the 1920s to mark the border on the ground. The search for underground water and mineral wealth was the principal stimulus to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Far North (South Australia)
The Far North is a large region of South Australia close to the Northern Territory border. Colloquial usage of the term in South Australia refers to that part of South Australia north of a line roughly from Ceduna through Port Augusta to Broken Hill. The South Australian Government defines the Far North region similarly with the exception of the Maralinga Tjarutja Lands, the Yalata Aboriginal community and other unincorporated crown lands in the state's far west, which are officially considered part of the Eyre and Western region. The region is both the largest and also the least populated of the state. The Far North is also known as the ''Arid Lands'' of South Australia as much of the region is desert. Deserts The deserts in the north east are the Simpson Desert, Tirari Desert, Painted Desert and the Pedirka Desert. To the north and north west the Great Victoria Desert predominates the landscape. Governance The Far North includes the following local government areas: An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
