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Throsby, Australian Capital Territory
Throsby is a designated suburb of Canberra, Australia in the district of Gungahlin. The suburb is adjacent to the suburbs of Kenny and Harrison and is bounded by the Federal Highway to the east, the ACT/NSW border to the north, Horse Park Drive to the south and the Goorooyarroo nature reserve to the west. The suburb is named after the explorer Charles Throsby who was one of the first Europeans to open up the lands west of the Blue Mountains to grazing and agriculture. Geography The cleared part of the suburb has two arms, the east arm is the head of Sullivans Creek, and there is a larger northern arm. The high point of Throsby is 656 metres near 'Old Joe' Hill on the easterly arm. The low point of the suburb when it is built is 610 meters where the creek drains towards the east. Geology The rocks in Throsby are from the Canberra Formation, which is middle Silurian in age. The rocks are sedimentary shales and mudstones which have been modified by pressure and folding. The roc ... [...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] |
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] |
Andesite
Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust. The name ''andesite'' is derived from the Andes mountain range, where this rock type is found in abundance. It was first applied by Christian Leopold von Buch in 1826. Description Andesite is an aphanitic (fine-grained) igneous rock that is intermediate in its content of silica and low in alkali metals. It has less than 20% quartz and 10% feldspathoid by volume, with at least 65% of the fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mudstones
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 distingui ... [...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] |
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] |
Sullivans Creek
Sullivans Creek, a partly perennial stream of the Murrumbidgee catchment within the Murray–Darling basin, is located in Canberra, Australian Capital Territory, Australia. Location and features Sullivans Creek rises close to the border between the Australian Capital Territory (ACT) and New South Wales, north-east of Kenny, and north-west of Watson. The creek is formed by runoff from Mount Majura, Mount Ainslie, O'Connor Ridge and Black Mountain. Sullivans Creek flows generally south-west, through a small channel within a much larger older gully system in its upper reaches; and through a series of urban sealed stormwater channels in its middle reaches; before reaching the grounds of the Australian National University, towards its confluence with the Molonglo River near Acton. Molonglo River is now dammed as Lake Burley Griffin. The creek has a catchment area of and is approximately long. The creek was originally called Canberry (or Canburry) Creek, since early European set ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greater Blue Mountains Area
The Greater Blue Mountains Area is a World Heritage Site located in the Blue Mountains of New South Wales, Australia. The area was placed on the World Heritage List at the 24th Session of the World Heritage Committee, held in Cairns in 2000. Etymology When the atmospheric temperature of the region rises, the essential oil from the eucalyptus species evaporates and disperses in the air, causing visible spectra of sunlight to scatter. The scattering causes the shorter wavelength colours (blue) to propagate more than the longer wavelength colours (red). This causes reflections from the mountains to appear bluish to human eyes, giving the mountain region its signature name, "Blue Mountains". Description The Greater Blue Mountains Area consists of of mostly forested landscape on a sandstone plateau inland from the Sydney central business district. The area includes vast expanses of wilderness and is equivalent in area to almost one-third the size of Belgium, or twice the siz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Throsby
Charles Throsby (1777 – 2 April 1828) was an English surgeon who, after he migrated to New South Wales in 1802, became an explorer, pioneer and parliamentarian. He opened up much new land beyond the Blue Mountains for colonial settlement. Early life Throsby was born in Glenfield near Leicester in England. He was engaged as a surgeon on the convict transport ''Coromandel'' carrying 136 male convicts from Portsmouth to Sydney. They departed Portsmouth 12 February 1802, and arrived in Sydney without calling in port on 13 June 1802, with no reported convict deaths under his care. Soon afterwards he joined the medical staff of the Colony, and in October 1802 he was appointed a magistrate and acting-surgeon at Castle Hill. In August 1804 he was transferred to Newcastle, and in April 1805 was made superintendent there. Towards the end of 1808 he was given a grant of 500 acres (2 km²) at Cabramatta, and in the following year resigned his position at Newcastle. In 181 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gungahlin (district)
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, Westo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canberra
Canberra ( ) is the capital city of Australia. Founded following the federation of the colonies of Australia as the seat of government for the new nation, it is Australia's largest inland city and the eighth-largest city overall. The city is located at the northern end of the Australian Capital Territory at the northern tip of the Australian Alps, the country's highest mountain range. As of June 2021, Canberra's estimated population was 453,558. The area chosen for the capital had been inhabited by Indigenous Australians for up to 21,000 years, with the principal group being the Ngunnawal people. European settlement commenced in the first half of the 19th century, as evidenced by surviving landmarks such as St John's Anglican Church and Blundells Cottage. On 1 January 1901, federation of the colonies of Australia was achieved. Following a long dispute over whether Sydney or Melbourne should be the national capital, a compromise was reached: the new capital would be buil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
