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Prospect Dolerite Intrusion
The Prospect dolerite intrusion, or Prospect intrusion, is a Jurassic picrite or dolerite laccolith that is situated in Sydney, New South Wales, Australia. Lying in the heart of Cumberland Plain, in the suburb of Pemulwuy (previously Greystanes), the intrusion is Sydney's largest body of igneous rock, rising to a height of above sea level. The site is formed by an intrusion of dolerite rock into Ashfield Shale. At least seven different rock types occur in the intrusion. The site was formed from around 200 million years ago when volcanic material (hot magmatic fluids) from the earth's upper mantle moved upwards and then sideways, which produced many different minerals in the upper part. Also known as Prospect Quarry, the eroded residue of the volcanic core became a quarry of the basalt plug that was carried out from 1820s until the late 2000s, where it contributed most of the crushed rock that were used for building construction and roads in the Sydney area. The intrusion co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prospect Highway
The Prospect Highway is an secondary urban road located in the Western Sydney, western suburbs of Sydney, New South Wales, Australia. The highway provides a free alternative link from the Road toll (modern), tolled M2 Hills Motorway, M2 Hills and the Westlink M7 motorways in the northeast to the M4 Western Motorway in the southwest and further south. Background The highway takes its name from the suburb Prospect, New South Wales, Prospect, which it links to via Seven Hills, New South Wales, Seven Hills. Like many highways in the Sydney area, it was formed by linking a series of local roads, including Abbott Road, Seven Hills Road, Wall Park Avenue, and Blacktown Road, Sydney, Blacktown Road. Proposals In 2015, the Government of New South Wales, NSW Government Roads & Maritime Services commenced planning an upgrade of a section of the highway between Reservoir Road in Prospect to St Martins Crescent in Blacktown. Exits and interchanges See also *Prospect Hill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
City Of Blacktown
Blacktown City Council is a local government area in Western Sydney, situated on the Cumberland Plain, approximately west of the Sydney central business district, in the state of New South Wales, Australia. Established in 1906 as the Blacktown Shire and becoming the Municipality of Blacktown in 1961 before gaining city status in 1979, the City occupies an area of and has a population of 366,534, making it the second most populous local government area in Sydney. The Mayor of the Blacktown City Council is Cr. Tony Bleasdale, OAM, a member of the Australian Labor Party, who was elected on 9 October 2019 following the resignation of Stephen Bali, MP. Suburbs and localities of the City of Blacktown These are the suburbs and localities in the local government area: History The first road from Prospect to Richmond became known as the "Black Town Road" and in 1860 the Railway Department gave the name of "Black Town Road Station" to the railway station at the junction of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unconformity
An unconformity is a buried erosional or non-depositional surface separating two rock masses or strata of different ages, indicating that sediment deposition was not continuous. In general, the older layer was exposed to erosion for an interval of time before deposition of the younger layer, but the term is used to describe any break in the sedimentary geologic record. The significance of angular unconformity (see below) was shown by James Hutton, who found examples of Hutton's Unconformity at Jedburgh in 1787 and at Siccar Point in 1788. The rocks above an unconformity are younger than the rocks beneath (unless the sequence has been overturned). An unconformity represents time during which no sediments were preserved in a region or were subsequently eroded before the next deposition. The local record for that time interval is missing and geologists must use other clues to discover that part of the geologic history of that area. The interval of geologic time not represented is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Mantle
The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust (at about under the oceans and about under the continents) and ends at the top of the lower mantle at . Temperatures range from approximately at the upper boundary with the crust to approximately at the boundary with the lower mantle. Upper mantle material that has come up onto the surface comprises about 55% olivine, 35% pyroxene, and 5 to 10% of calcium oxide and aluminum oxide minerals such as plagioclase, spinel, or garnet, depending upon depth. Seismic structure The density profile through Earth is determined by the velocity of seismic waves. Density increases progressively in each layer, largely due to compression of the rock at increased depths. Abrupt changes in density occur where the material composition changes. The upper mantle begins just beneath the crust and ends at the top of the lower mantle. The upper mantle causes the tectonic plates to move. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magmatic
Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites. Besides molten rock, magma may also contain suspended crystals and gas bubbles. Magma is produced by melting of the mantle or the crust in various tectonic settings, which on Earth include subduction zones, continental rift zones, mid-ocean ridges and hotspots. Mantle and crustal melts migrate upwards through the crust where they are thought to be stored in magma chambers or trans-crustal crystal-rich mush zones. During magma's storage in the crust, its composition may be modified by fractional crystallization, contamination with crustal melts, magma mixing, and degassing. Following its ascent through the crust, magma may feed a volcano and be extruded as lava, or it may solidify underground to form an intrusion, such as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igneous Rock
Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main The three types of rocks, rock types, the others being Sedimentary rock, sedimentary and metamorphic rock, metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from Partial melting, partial melts of existing rocks in either a Terrestrial planet, planet's mantle (geology), mantle or crust (geology), crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive (geology), extrusive rocks. Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form Volcanic glass, natural glasses. Igneous rocks occur in a wide range of geological settings: shields, platforms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intrusion
In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New Jersey; the Henry Mountains of Utah; the Bushveld Igneous Complex of South Africa; Shiprock in New Mexico; the Ardnamurchan intrusion in Scotland; and the Sierra Nevada Batholith of California. Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained (phaneritic). Intrusive igneous rocks are classified separately from extrusive igneous rocks, generally on the basis of their mineral content. The relative amounts of quartz, alkali feldspar, plagioclase, and feldspathoid is particularly important in classifying intrusive igneous rocks. Intrusions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greystanes, New South Wales
Greystanes is a suburb in Greater Western Sydney, New South Wales, Australia. Greystanes is located 25 kilometres west of the Sydney central business district in the local government area of Cumberland Council. Founded in the late 1790s, Greystanes is one of the oldest suburbs in Sydney. History In the early years of British settlement the area was known as Prospect Hill and was the site of the first land grants to emancipated convicts in 1791. In this period it was one of several areas of conflict between the Darug people and the settlers, the Darug people being led for many years of guerrilla warfare by Pemulwuy. The area later became differentiated into Prospect, to the west of Greystanes Creek, and Greystanes to the east of the Creek, the latter taking its name from a historical home on Prospect Hill, built by Nelson Simmons Lawson, third child of Lieutenant William Lawson. The name 'Grey Stanes', given by Nelson Lawson, came from the outcrops of basalt on Prospect Hil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pemulwuy, New South Wales
Pemulwuy is a suburb in Greater Western Sydney, in the state of New South Wales, Australia. Pemulwuy is located 30 kilometres west of the Sydney central business district in the local government area of the Cumberland Council. Pemulwuy is home to the highest point between the Blue Mountains and Sydney, the summit of Prospect Hill. The quarrying of blue metal, basalt and dolerite was abundant in the area in the past two centuries. Pemulwuy, formerly part of Prospect, is a relatively new suburb, with development beginning in 2004 on the site of a former Boral quarry and CSIRO sites. History Pemulwuy is named after the Aboriginal warrior, Pemulwuy, who led attacks on the British settlements in the surrounding areas, particularly on the Toongabbie settlement. When Captain-Lieutenant Watkin Tench made another official journey to the west in 1789, he began his journey with reference to Prospect Hill, which commanded a view of the great chain of mountains to the west. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cumberland Plain
The Cumberland Plain, an IBRA biogeographic region, is a relatively flat region lying to the west of Sydney CBD in New South Wales, Australia. Cumberland Basin is the preferred physiographic and geological term for the low-lying plain of the Permian-Triassic Sydney Basin found between Sydney and the Blue Mountains, and it is a structural sub-basin of the Sydney Basin. The Cumberland Plain has an area of roughly , which lies on Triassic shales and sandstones. Shaping the geography of Sydney, it extends from north of Windsor in the north, to Picton in the south; and from the Nepean-Hawkesbury River in the west almost to Sydney City's Inner West in the east. Much of the Sydney metropolitan area is located on the Plain. The Hornsby Plateau is located to the north and is dissected by steep valleys. The plain takes its name from Cumberland County, in which it is situated, one of the cadastral land divisions of New South Wales. The name ''Cumberland'' was conferred on the County ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Museum
The Australian Museum is a heritage-listed museum at 1 William Street, Sydney central business district, New South Wales, Australia. It is the oldest museum in Australia,Design 5, 2016, p.1 and the fifth oldest natural history museum in the world, with an international reputation in the fields of natural history and anthropology. It was first conceived and developed along the contemporary European model of an encyclopedic warehouse of cultural and natural history and features collections of vertebrate and invertebrate zoology, as well as mineralogy, palaeontology and anthropology. Apart from exhibitions, the museum is also involved in Indigenous studies research and community programs. In the museum's early years, collecting was its main priority, and specimens were commonly traded with British and other European institutions. The scientific stature of the museum was established under the curatorship of Gerard Krefft, himself a published scientist. The museum is located at ... [...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] |
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