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Eucla Basin
The Eucla Basin is an artesian depression located in Western Australia and South Australia. The onshore-offshore depression covers approximately 1,141,000 km² and slopes southward to an open bay known as the Great Australian Bight. It extends more than 500 km offshore and about 350 km inland from the coastline. The Eucla Basin is a Cenozoic basin consisting mostly of carbonate sediments and sedimentary rocks. The basin contains a sandstone aquifer at its base (confined), and an unconfined limestone aquifer. The surface area of the basin (and Nullarbor Plain) consists mostly of grazing and rangeland, but nickel and gold are mined at the western end. Very few people live in this part of the country, with most of the region having fewer than one inhabitant per km². In normal years, the area receives less than 250 mm of precipitation. Due to a shortage of regional seals and source rocks, the basin has poor petroleum prospects, but it is forming as a major zircon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artesian Aquifer
An artesian aquifer is a confined aquifer containing groundwater under positive pressure. An artesian aquifer has trapped water, surrounded by layers of impermeable rock or clay, which apply positive pressure to the water contained within the aquifer. If a well were to be sunk into an artesian aquifer, water in the well-pipe would rise to a height corresponding to the point where hydrostatic equilibrium is reached. A well drilled into such an aquifer is called an ''artesian well''. If water reaches the ground surface under the natural pressure of the aquifer, the well is termed a ''flowing artesian well''. Fossil water aquifers can also be artesian if they are under sufficient pressure from the surrounding rocks, similar to how many newly tapped oil wells are pressurized. From the previous statement, it can be inferred that not all aquifers are artesian (i.e., water table aquifers occur where the groundwater level at the top of the aquifer is at equilibrium with atmospher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precipitation (meteorology)
In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds. The main forms of precipitation include drizzle, rain, sleet, snow, ice pellets, graupel and hail. Precipitation occurs when a portion of the atmosphere becomes saturated with water vapor (reaching 100% relative humidity), so that the water condenses and "precipitates" or falls. Thus, fog and mist are not precipitation but colloids, because the water vapor does not condense sufficiently to precipitate. Two processes, possibly acting together, can lead to air becoming saturated: cooling the air or adding water vapor to the air. Precipitation forms as smaller droplets coalesce via collision with other rain drops or ice crystals within a cloud. Short, intense periods of rain in scattered locations are called showers. Moisture that is lifted or otherwise forced to rise over a layer of sub-freezing air at the surface may be condense ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Western Australia
Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Australia is Australia's largest state, with a total land area of . It is the second-largest country subdivision in the world, surpassed only by Russia's Sakha Republic. the state has 2.76 million inhabitants percent of the national total. The vast majority (92 percent) live in the south-west corner; 79 percent of the population lives in the Perth area, leaving the remainder of the state sparsely populated. The first Europeans to visit Western Australia belonged to the Dutch Dirk Hartog expedition, who visited the Western Australian coast in 1616. The first permanent European colony of Western Australia occurred following the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depressions Of Australia
Depression may refer to: Mental health * Depression (mood), a state of low mood and aversion to activity * Mood disorders characterized by depression are commonly referred to as simply ''depression'', including: ** Dysthymia, also known as persistent depressive disorder ** Major depressive disorder, also known as clinical depression Economics * Economic depression, a sustained, long-term downturn in economic activity in one or more economies ** Great Depression, a severe economic depression during the 1930s, commonly referred to as simply ''the Depression'' ** Long Depression, an economic depression during 1873–96, known at the time as the ''Great Depression'' Biology * Depression (kinesiology), an anatomical term of motion, refers to downward movement, the opposite of elevation * Depression (physiology), a reduction in a biological variable or the function of an organ * Central nervous system depression, physiological depression of the central nervous system that can result ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roe Plains
The Roe Plains is a coastal plain in the southeastern corner of Western Australia. The Roe Plains are predominantly marine dunes on a coastal plain. The plains are bounded on the south by the Great Australian Bight. They are bounded on the west by the Baxter Cliffs, which extend for nearly 200 km along the shore of the bight, and on the east by the Bunda Cliffs, which extend eastwards from near Eucla for 220 km along the coast of South Australia. The plains are bounded on the north by the Hampton Tableland, an escarpment which rises to the Nullarbor Plain, and which is a continuation of the Baxter and Bunda cliffs. The Eyre Highway traverses the Roe Plains between the Madura Pass on the west and the Eucla Pass on the east. The only current human settlements on the Roe Plains are Madura and Mundrabilla roadhouses and the nearby stations — Madura Station and Mundrabilla Station. The Roe Plains extend further west than Madura Pass to Twilight Cove, roughly south of Cockleb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bunda Cliffs
The Bunda Cliffs, also known as the Nullarbor Cliffs, are a coastal scarp on the southern coast of Australia, extending from the western coast of South Australia to the south-eastern corner of Western Australia. Geography The Bunda Cliffs extend for along the shore of the Great Australian Bight near its northern extremity. The cliffs extend from Head of the Bight in the east to Eucla, Western Australia in the west. There are some local cliff-line breaks towards the eastern and western ends, with a uninterrupted cliff line from near the eastern end to a point 28 km west of the South Australia–Western Australia border.G. A. Wakelin-King & J. A. Webb (2020) Origin, geomorphology and geoheritage potential of Australia’s longest coastal cliff lines, Australian Journal of Earth Sciences, 67:5, 649–661, DOI: 10.1080/08120099.2020.1742202 The cliffs are bounded on the north by the arid Nullarbor Plain, in a very sparsely settled area of Australia. The cliffs, which are s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hampton Range
Hampton Tableland is a feature that is found at the northern side of the current alignment of the Eyre Highway between Madura and Eucla in Western Australia, at the southern edge of the Nullarbor Plain. Earlier trans-Nullarbor tracks were located along different routes from the current highway. The tableland has a number of caves occurring on it, some with notable features. Despite popular conceptions of the Nullarbor being denuded of vegetation or desert-like, a wide range of flora and fauna are well recorded. The tableland escarpment is a feature along the Eyre Highway, which sits on the edge of the Roe Plains The Roe Plains is a coastal plain in the southeastern corner of Western Australia. The Roe Plains are predominantly marine dunes on a coastal plain. The plains are bounded on the south by the Great Australian Bight. They are bounded on the west .... Notes {{Reflist, 30em Nullarbor Plain Tables (landform) Hampton bioregion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baxter Cliffs
The Baxter Cliffs is a long stretch of coastal cliff on the south coast of Western Australia. The Baxter Cliffs are up to 80 metres high and extend for almost 200 kilometres along the coast, from Point Culver in the west, which marks the northern end of the Israelite Plain, northeastwards to Twilight Cove in the east, which is the transition from the cliffs to the coastal Roe Plains.N. P. James, Y. Bone, R. M. Carter & C. V. Murray-Wallace (2006) Origin of the Late Neogene Roe Plains and their calcarenite veneer: implications for sedimentology and tectonics in the Great Australian Bight, Australian Journal of Earth Sciences, 53:3, 407-419, DOI: 10.1080/08120090500499289 Toolinna Cove is the only place along the Baxter Cliffs where a boat can be landed. The Baxter Cliffs are part of a long erosional escarpment which extends east and west across the Eucla Basin sedimentary formation. Other portions of the escarpment include the Hampton Tableland north of the Roe Plains, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eyre Peninsula
The Eyre Peninsula is a triangular peninsula in South Australia. It is bounded by the Spencer Gulf on the east, the Great Australian Bight on the west, and the Gawler Ranges to the north. Originally called Eyre’s Peninsula, it was named after explorer Edward John Eyre, who explored parts of the peninsula in 1839–41. The coastline was first charted by the expeditions of Matthew Flinders in 1801–02 and French explorer Nicolas Baudin around the same time. Flinders also named the nearby Yorke’s Peninsula and Spencer’s Gulph on the same voyage. The peninsula's economy is primarily agricultural, with growing aquaculture, mining, and tourism sectors. The main towns are Port Lincoln in the south, Whyalla and Port Augusta in the northeast, and Ceduna in the northwest. Port Lincoln (''Galinyala'' in Barngarla), Whyalla and Port Augusta (''Goordnada'') are part of the Barngarla Aboriginal country. Ceduna is within the Wirangu country. Naming and extent The peninsula was n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Shield
The Australian Shield, also called the Western Australian Shield, is a geological feature known as a shield that occupies more than half of the continent of Australia. The word shield is used because it refers to ancient, molten rock which has cooled and solidified. The Australian Shield has a characteristic depth of and an estimated age of 2.8 to 3.5 billion years. In places younger sedimentary rock covers the shield's Precambrian surface. Extent It occupies the portion of Australia west of a line running north–south roughly from the eastern shore of Arnhem Land on the Bay or Gulf of Carpentaria to the Eyre Peninsula in the state of South Australia, and skirting to the west of the Simpson Desert in the interior. The plateau has an average elevation of between . The shield is fractured into a number of distinct blocks, including two cratons - the Pilbara Craton in the North and the Yilgarn Craton in the Southwest. These two cratons are the oldest part of the shield ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclone Zircon Project
The Cyclone Zircon Project is a large mineral sands deposit located in the Eucla Basin in Western Australia, near the border with South Australia. Cyclone represents one of the largest zirconium reserves in Australia having estimated reserves of 98 million tonnes of ore grading 0.95% zirconium Zirconium is a chemical element with the symbol Zr and atomic number 40. The name ''zirconium'' is taken from the name of the mineral zircon, the most important source of zirconium. The word is related to Persian '' zargun'' (zircon; ''zar-gun'', ... metal. References {{DEFAULTSORT:Cyclone Zircon Project Zirconium mines in Australia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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