The Wianamatta Group is a geological feature of the Sydney Basin , New South Wales , Australia that directly overlies the older (but still Triassic in age) Hawkesbury sandstone and generally comprise fine grained sedimentary rocks such as shales and laminites as well as less common sandstone units.
17-534: The Wianamatta Group is made up of the following units (listed in stratigraphic order): The Wianamatta Group was derived from the Aboriginal name for South Creek . It was officially established in 1952, fully attested in 1954 and further amended in 1979. The Wianamatta Group is the youngest geological layer member of the Sydney Basin , and therefore lies at the highest point as the highest layer member. It
34-578: A marshy plain deposited on the delta, meandered through the rivers, and deposited sand at various locations, each of which was narrowly defined, which later solidified into sandstone. Today's weathering of the surface of the existing claystone produces abundant clay, which leads to the formation of clay soils with low water permeability, as they occur, for example, on the Cumberland Plain widespread. Here are Podsol floors widespread that swell when supplying water and shrink during drying. Over
51-668: Is a creek that is part of the Hawkesbury - Nepean catchment, located on the Cumberland Plain in Greater Western Sydney , New South Wales , Australia . The creek rises in Sydney 's south western suburbs below the former Oran Park Raceway about 4 kilometres (2.5 mi) north-east of Narellan and 7 kilometres (4.3 mi) west of Minto . In its upper catchment, the creek forms the boundary between
68-696: Is an Aboriginal word of the Dharug language , meaning 'mother place'. Evidence of early Aboriginal people has been found in several locations within the Blacktown Local government area . Shell middens from the Darug people have been found near the sewage treatment plant on Breakfast Creek and South Creek. South Creek was dual-named as Wianamatta on 28 March 2003 by the Geographical Names Board of New South Wales (GNB). It
85-544: Is close to the surface are also susceptible to dryland salinity. Groundwater quality can range from fresh to highly saline, with the deeper groundwater generally less saline. Other rock types found in the Sydney Basin include the Narrabeen shale , Mittagong formation , Illawarra Coal Measures , Newcastle Coal Measures, and Shoalhaven Group. South Creek (New South Wales) The South Creek or Wianamatta
102-486: Is located in Greater Western Sydney , New South Wales , Australia . Eastern Creek rises in the western suburbs of Sydney , below Sugarloaf Ridge at Western Sydney Regional Park about 6 kilometres (3.7 mi) west by north of Smithfield . The creek flows generally north, joined by the Reedy , Angus, Bungarribee, Breakfast , Burdekin, Quakers, and Bells creeks, before reaching its confluence with South Creek , in
119-486: The Wianamatta Group rocks are generally less saline than the near-surface occurrences. The Wianamatta Group has been inferred to represent a cycle of basin infilling associated with the migration of a large delta front from west to east. The Ashfield Shale was deposited in a low energy marine environment and preserves laminated silty sediments. The Minchinbury Sandstone comprises a set of sandy barrier islands at
136-500: The boundary of the suburbs of Bringelly , Rossmore , Badgerys Creek , Kemps Creek , Claremont Meadows , Orchard Hills , Werrington , St Marys , Werrington County , Dunheved , Llandilo , Shanes Park , Berkshire Park , Windsor Downs , Riverstone , Vineyard , Mulgrave , Windsor , McGraths Hill and Pitt Town Bottoms . The South Creek or Wianamatta is joined by Lowes Creek and Rileys Creek at Bringelly; by Thompsons Creek at Rossmore; by Badgerys Creek and by Kemps Creek at
153-424: The former shoreline. The Bringelly Shale was deposited in a swampy alluvial plain with meandering streams flowing from the west forming discontinuous beds of sandstone. Weathering of the shale units produces a rich clayey soil, often with poor drainage, such as that in the Cumberland Plain . These clay soils are recognised as being reactive with appreciable Shrink-swell capacity . Low-lying areas where groundwater
170-421: The pitches of the Wianamatta Group, water-bearing layers can form. Deep and large clay deposits of this formation are able to collect groundwater ; however, if they are at or near the surface, salted dry land may form as the water evaporates. The quality of the groundwater over the pitches can be good, so that drinkable water occurs, or it can be very saline and thus not potable. The lower groundwater resources in
187-561: The proposal and inviting comments. After James Ruse sold his Experiment Farm at Parramatta, in January 1794 he obtained a grant of land at the junction of the Hawkesbury and South Creek (which for a time was known as Ruse's Creek). A township of South Creek used to exist near St Marys. The name only existed for a few years in the early settlement of New South Wales and now it is part of St Marys/Dunheved. One of its pioneer settlers
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#1732786748973204-633: The suburb of Vineyard . The creek descends 113 metres (371 ft) over its 30 kilometres (19 mi) course . Eastern Creek is transversed by the M4 Western Motorway and the Great Western Highway between Prospect and Eastern Creek ; and the Western railway line west of Doonside . 33°45′S 150°52′E / 33.750°S 150.867°E / -33.750; 150.867 This article related to
221-412: The suburb of Badgerys Creek; by Cosgrove Creek at Luddenham; by Blaxland Creek at Orchard Hills; by Byrnes Creek at St Marys; by Claremont Creek at Werrington; by Werrington Creek at Werrington County; by three unnamed creeks at Llandilo, Marsden Park, and Riverstone; by Ropes Creek at Shanes Park; by Eastern Creek at Vineyard; by McGraths Hill Wetlands and by McKenzies Creek at McGraths Hill. Wianamatta
238-485: The suburbs of Oran Park and Catherine Field . The creek flows generally north, joined by seventeen tributaries including Badgerys Creek , Kemps Creek , Ropes Creek and Eastern Creek , until reaching its confluence with the Hawkesbury River, near Windsor . The creek descends 94 metres (308 ft) over its 70 kilometres (43 mi) course . From source to mouth , the creek flows through or forms
255-542: Was Thomas Jamison (1753–1811) who arrived with the First Fleet and became Surgeon-General of New South Wales in 1801. Jamisontown in the Penrith area is also named after him. 33°48′55″S 150°46′04″E / 33.8152°S 150.7679°E / -33.8152; 150.7679 Eastern Creek (New South Wales) Eastern Creek , a watercourse that is part of the Hawkesbury - Nepean catchment,
272-416: Was deposited in connection with a large river delta , which shifted over time from west to east. This is evidenced by the sequence of strata , which clearly show the transition from marine deposits in front of the delta to deposits on land: Ashfield shale was formed from clayey marine sediments. The subsequent Minchinbury Sandstone emerged from beach - Nehrungs Islands. The Bringelly shale became alluvial in
289-574: Was dual-named after a submission that the name be changed. However, a lengthy investigation followed, and after consultation with local Aboriginal Land Councils it was decided after extensive workshops carried by the GNB, that instead, a dual-naming proposal should be pursued instead. Following that decision, the GNB carried out an extensive consultation throughout the entire state of NSW, contacting all Aboriginal land councils on record as well as placing entries in every prominent and regional newspaper explaining
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