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Jacka, Australian Capital Territory
Jacka is a suburb of Gungahlin, Canberra, the National Capital of Australia. The suburb was gazetted on 25 April 2001 and development began in 2013. It had some residents at the beginning of 2014. The suburb is named after Albert Jacka, the first Australian to be decorated with the Victoria Cross during the First World War, receiving the medal for his actions during the Gallipoli Campaign. Jacka is located in north Gungahlin adjacent to the suburbs of Amaroo, Taylor, Bonner and Moncrieff. The suburb is located approximately 4 km from the Gungahlin Town Centre and 16 km from the centre of Canberra. Development The suburb when finished is expected to accommodate approximately 1500 blocksACT Planning and Land Authority (2008), ''Jacka Concept Plan, ACT Parliamentary Counsel'' and contain a variety in housing types including: *Standard residential; *Medium and higher density residential; *Compact block housing in the locations identified in the Compact Block Housin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gungahlin
The District of Gungahlin () is one of the original eighteen districts of the Australian Capital Territory used in land administration. The Gungahlin Region is one of fastest growing regions within Australia. The district is subdivided into divisions ( suburbs), sections and blocks. ''Gungahlin'' is an Aboriginal word meaning either "white man's house" or "little rocky hill". Gungahlin comprised sixteen suburbs, including several currently under construction and a further suburb planned. The town of Gungahlin was part of the original 1957 plan for future development in the ACT and in 1991 was officially launched as Canberra's fourth 'town' by the ACT Chief Minister. At the time, the population of Gungahlin was just 389 residents. At the , the population of the district was 87,682. Within the district is Canberra's northernmost town centre that is situated north of Canberra city centre. The town centre is one of five satellites of Canberra, seated in Woden, Tuggeranong, Wes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Jacka
Albert Jacka, (10 January 1893 – 17 January 1932) was an List of Australian Victoria Cross recipients, Australian recipient of the Victoria Cross, the highest decoration for gallantry "in the face of the enemy" that can be awarded to members of the British and Commonwealth of Nations, Commonwealth armed forces. Jacka was the first Australian to be decorated with the VC during the First World War, receiving the medal for his actions during the Gallipoli Campaign. He later served on the Western Front (World War I), Western Front and was twice more decorated for his bravery. After the war, Jacka returned to Australia and entered business, establishing the electrical goods importing and exporting business ''Roxburgh, Jacka & Co. Pty Ltd''. He was later elected to the local council, becoming mayor of the City of St Kilda. Jacka never fully recovered from the wounds he sustained during his war service, and died aged 39. Early life Albert Jacka was born on a dairy farm near Winchelse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, ''tuffaceous sandstone''). Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the ''moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called tufa in guidebooks and in television programmes. Volcanic ash The material that is expelled in a volcanic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ashstone
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, ''tuffaceous sandstone''). Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the ''moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called tufa in guidebooks and in television programmes. Volcanic ash The material that is expelled in a volcanic e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dacite
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz. Dacite is relatively common, occurring in many tectonic settings. It is associated with andesite and rhyolite as part of the subalkaline volcanic rock, subalkaline tholeiite, tholeiitic and calc-alkaline magma series. Composition Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene (augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, although in small proportions, in some dacites, and when abundant gives rise to rocks that form rhyodacite, transitions to the rhyolites. The rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mudstone
Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds. Mudstone is distinguished from '' shale'' by its lack of fissility (parallel layering).Blatt, H., and R.J. Tracy, 1996, ''Petrology.'' New York, New York, W. H. Freeman, 2nd ed, 529 pp. The term ''mudstone'' is also used to describe carbonate rocks (limestone or dolomite) that are composed predominantly of carbonate mud. However, in most contexts, the term refers to siliciclastic mudstone, composed mostly of silicate minerals. The NASA Curiosity rover has found deposits of mudstone on Mars that contain organic substances such as propane, benzene and toluene. Definition There is not a single definition of mudstone that has gained general acceptance,Boggs 2006, p.143 though there is wide agreement that mudstones are fine-grained sedimentary rocks, composed mostly of silicate grains with a grain size less than . Individual grains this size are too small to be disting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.Blatt, Harvey and Robert J. Tracy (1996) ''Petrology: Igneous, Sedimentary and Metamorphic'', 2nd ed., Freeman, pp. 281–292 Shale is characterized by its tendency to split into thin layers ( laminae) less than one centimeter in thickness. This property is called '' fissility''. Shale is the most common sedimentary rock. The term ''shale'' is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the more narrow sense of clay-rich fissile mudrock. Texture Shale typically exhibits varying degrees of fissility. Because of the parallel orientation of clay mineral flakes in shale, it breaks into thin layers, often splintery and usually parallel to the otherwise indistinguishable beddin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slate
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The foliation in slate is called "slaty cleavage". It is caused by strong compression causing fine grained clay flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation, with a specialized tool in the quarry, many slates will display a property called fissility, forming smooth flat sheets of stone which have long been used for roofing, floor tiles, and other purposes. Slate is frequently grey in color, especially when seen, en masse, covering roofs. However, slate occurs in a variety of colors even from a single locality; for ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silurian
The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a few million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. One important event in this period was the initial establishment of terrestrial life in what is known as the Silurian-Devonian Terrestrial Revolution: vascular plants emerged from more primitive land plants, dikaryan fungi started expanding and diversifying along with glomeromycotan fungi, and three groups of arthropods (myriapods, arachnids and hexapods) became fully terrestrialized. A significant evolutionary milestone during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latham's Snipe
Latham's snipe (''Gallinago hardwickii''), also known as the Japanese snipe, is a medium-sized, long-billed, migratory snipe of the East Asian–Australasian Flyway. Description The snipe is 29–33 cm long, with a wingspan of 50–54 cm and weight of 150–230 g. Identification It is identifiable as a ''Gallinago'' snipe by its cryptically-patterned black, brown, buff and white plumage, but is not easily distinguished from Swinhoe's and pin-tailed snipe in the field, though it is slightly larger. Distribution and habitat The snipe breeds mainly in Hokkaidō in northern Japan, with smaller numbers on Honshū, the eastern Russian mainland and Sakhalin and, historically, the Kurile Islands. The entire population migrates and spends the non-breeding season principally in eastern Australia, where it is the commonest ''Gallinago'' snipe. It has been recorded on migration in Taiwan, the Philippines and New Guinea, and is a rare straggler to New Zealand. The snipe's bree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Heritage List were created and by 2007 the Register had been replaced by these and various state and territory heritage registers. Places listed on the Register remain in a non-statutory archive and are still able to be viewed via the National Heritage Database. History The register was initially compiled between 1976 and 2003 by the Australian Heritage Commission, after which the register was maintained by the Australian Heritage Council. 13,000 places were listed. The expression "national estate" was first used by the British architect Clough Williams-Ellis, and reached Australia in the 1970s.Heritage of Australia, pp. 9–13 It was incorporated into the ''Australian Heritage Commission Act 1975'' and was used to describe a collection o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
