|
Bethanga, Victoria
Bethanga is a town in north-eastern Victoria, Australia in the Shire of Towong local government area, from the state capital, Melbourne. At the 2016 census, Bethanga had a population of 471 and gives its name to the Bethanga Bridge. Mining History Mining prior to 1876 Prior to 1876 gold mining in the Bethanga district occurred to the north of the town and were known as the 'Talgarno diggings'. Reports of alluvial gold date back to 1852. Early gold fields were worked at Ruby Creek, Gold Creek and Jarvis Creek. The opening of the Bethanga goldfields began with the discovery of a gold-bearing quartz reef on New Years Day 1876. The 'Gift' mine site is located south east of Kurrajong Gap lookout to the west of Bethanga township. Mining 1876 - 1910 Bethanga was established as a result of the discovery of gold. Gold was first reported in the Bethanga area in 1852, but it was not until 1876 that the discovery of a reef led to the development of the Bethanga goldfields. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shire Of Towong
Shire is a traditional term for an administrative division of land in Great Britain and some other English-speaking countries such as Australia and New Zealand. It is generally synonymous with county. It was first used in Wessex from the beginning of Anglo-Saxon settlement, and spread to most of the rest of England in the tenth century. In some rural parts of Australia, a shire is a local government area; however, in Australia it is not synonymous with a "county", which is a lands administrative division. Etymology The word ''shire'' derives from the Old English , from the Proto-Germanic ( goh, sćira), denoting an 'official charge' a 'district under a governor', and a 'care'. In the UK, ''shire'' became synonymous with ''county'', an administrative term introduced to England through the Norman Conquest in the later part of the eleventh century. In contemporary British usage, the word ''counties'' also refers to shires, mainly in places such as Shire Hall. In regions with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Hume
Hume Dam, formerly the Hume Weir, is a major dam across the Murray River downstream of its junction with the Mitta River in the Riverina region of New South Wales, Australia. The dam's purpose includes flood mitigation, hydroelectricity, hydro-power, irrigation, water supply and conservation. The impounded reservoir is called Lake Hume, formerly the Hume Reservoir. It is a gated gravity dam, concrete gravity dam with four embankment dam, earth embankments and twenty-nine Spillway#Types, vertical undershot gated concrete overflow spillways. Location Constructed over a 17-year period between 1919 and 1936, the Hume Dam is located approximately east of the city of Albury. The dam was built, involving a workforce of thousands, by a consortium of Government of New South Wales, NSW and Victoria State Government, Victorian government agency, government agencies that included the Water Resources Commission of New South Wales, the Public Works Department of New South Wales, and the State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bethanga August 2012
Bethanga is a town in north-eastern Victoria, Australia in the Shire of Towong local government area, from the state capital, Melbourne. At the 2016 census, Bethanga had a population of 471 and gives its name to the Bethanga Bridge. Mining History Mining prior to 1876 Prior to 1876 gold mining in the Bethanga district occurred to the north of the town and were known as the 'Talgarno diggings'. Reports of alluvial gold date back to 1852. Early gold fields were worked at Ruby Creek, Gold Creek and Jarvis Creek. The opening of the Bethanga goldfields began with the discovery of a gold-bearing quartz reef on New Years Day 1876. The 'Gift' mine site is located south east of Kurrajong Gap lookout to the west of Bethanga township. Mining 1876 - 1910 Bethanga was established as a result of the discovery of gold. Gold was first reported in the Bethanga area in 1852, but it was not until 1876 that the discovery of a reef led to the development of the Bethanga goldfields. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at . Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. There are many different varieties of quartz, several of which are classified as gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia. Quartz is the mineral defining the val ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schists
Schist ( ) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture reflects a high content of platy minerals, such as micas, talc, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz. Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a ''mica schist''). Where the type of the original rock (the protolith) is discernible, the schist is usually given a name reflecting its protolith, such as ''schistose met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gneiss
Gneiss ( ) is a common and widely distributed type of metamorphic rock. It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks. Gneiss forms at higher temperatures and pressures than schist. Gneiss nearly always shows a banded texture characterized by alternating darker and lighter colored bands and without a distinct cleavage. Gneisses are common in the ancient crust of continental shields. Some of the oldest rocks on Earth are gneisses, such as the Acasta Gneiss. Description Orthogneiss from the Czech Republic In traditional English and North American usage, a gneiss is a coarse-grained metamorphic rock showing compositional banding (gneissic banding) but poorly developed schistosity and indistinct cleavage. In other words, it is a metamorphic rock composed of mineral grains easily seen with the unaided eye, which form obvious compositional layers, but which has only a weak tendency to fracture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
