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Lake Austin (Australia)
Lake Austin is an ephemeral salt lake located in the Mid West region of Western Australia, approximately south of Cue and north of Mount Magnet. It is named after Robert Austin, who explored the area around the lake in 1854. The abandoned town of Austin is located on an island in the lake. The Great Northern Highway passes through this island as it crosses the lake. Lake Austin is also the name of the locality surrounding it. Lake Austin is an evaporation basin for an arheic internal drainage system covering an area of . The lake itself lies in a basin covering , or excluding the many islands. It is about long and wide. The lake usually fills in response to heavy rainfall in the summer and autumn; anecdotally, this occurs twice about every ten years. Water salinity varies according to lake levels: recorded values have ranged from 44.8 mS/cm during a flooding event in 2000, to 164 mS/cm in the late 1970s. The lake bed is flat, variably crusted with salt, and devoid of veg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Australia
Western Australia (WA) is the westernmost state of Australia. 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 land area of , and is also the List of country subdivisions by area, second-largest subdivision of any country on Earth. Western Australia has a diverse range of climates, including tropical conditions in the Kimberley (Western Australia), Kimberley, deserts in the interior (including the Great Sandy Desert, Little Sandy Desert, Gibson Desert, and Great Victoria Desert) and a Mediterranean climate on the south-west and southern coastal areas. the state has 2.965 million inhabitants—10.9 percent of the national total. Over 90 percent of the state's population live in the South-West Land Division, south-west corner and around 80 percent live in the state capital Perth, leaving the remainder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salinity
Salinity () is the saltiness or amount of salt (chemistry), salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal to per mille, ‰). Salinity is an important factor in determining many aspects of the chemistry of natural waters and of biological processes within it, and is a state function, thermodynamic state variable that, along with temperature and pressure, governs physical characteristics like the density and heat capacity of the water. A contour line of constant salinity is called an ''isohaline'', or sometimes ''isohale''. Definitions Salinity in rivers, lakes, and the ocean is conceptually simple, but technically challenging to define and measure precisely. Conceptually the salinity is the quantity of dissolved salt content of the water. Salts are compounds like sodium chloride, magnesium sulfate, potassium nitrate, and sod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pastoral Lease
A pastoral lease, sometimes called a pastoral run, is an arrangement used in both Australia and New Zealand where government-owned Crown land is leased out to Pastoral farming, graziers for the purpose of livestock grazing on rangelands. Australia Historical background In the Australian states and territories, leases constitute a land apportionment system created in the mid-19th century to facilitate the orderly division and sale of land to European colonists. Legislation ensured that certain Aboriginal rights were embodied in pastoral leases. However, according to historian Henry Reynolds (historian), Henry Reynolds, several colonial leaders ran roughshod over these rights, including Sir John Downer (when the Northern Territory was governed by the colony of South Australia, colonial government of South Australia); Sir John Forrest in the colony of Western Australia; and Sir Samuel Griffith in colony of Queensland, Queensland. Today Pastoral leases exist in both Law of Australia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austin Downs
Austin Downs Station or Austin Downs is a pastoral lease in the Mid West region of Western Australia. Description The property covers an area of and has traditionally farmed sheep for the production of wool. The station is located in the Murchison region of Western Australia; the nearest town is Cue, to the south east of the homestead. An area of within the station is composed of reserves and crown land. The soil has a low level of erosion, with 96% of the land being described as nil or minor. The perennial vegetation condition is good with 15% of vegetation cover being described as poor or very poor. The station contains part of Lake Austin and close to Nallan Creek. The station land includes Walga Rock, a large granite monolith. History 128 bales of greasy wool from the station were sold in London in 1910 at 11d. per pound. Later the same year a bank clerk named Studds from Cue committed suicide on the property and was found several weeks later with his revolver still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gypsum
Gypsum is a soft sulfate mineral composed of calcium sulfate Hydrate, dihydrate, with the chemical formula . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk. Gypsum also Crystallization, crystallizes as translucent crystals of selenite (mineral), selenite. It forms as an evaporite mineral and as a Mineral hydration, hydration product of anhydrite. The Mohs scale of mineral hardness defines gypsum as hardness value 2 based on Scratch hardness, scratch hardness comparison. Fine-grained white or lightly tinted forms of gypsum known as alabaster have been used for sculpture by many cultures including Ancient Egypt, Mesopotamia, Ancient Rome, the Byzantine Empire, and the Nottingham alabasters of Medieval England. Etymology and history The word ''wikt:gypsum, gypsum'' is derived from the Greek language, Greek word (), "plaster". Because the quarry, quarries of the Montmartre district of P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tecticornia Pruinosa
''Tecticornia'' is a genus of succulent, salt tolerant plants largely endemic to Australia. Taxa in the genus are commonly referred to as samphires. In 2007, the genus ''Halosarcia'', along with three other Australian genera (''Pachycornia'', ''Sclerostegia'' and ''Tegicornia'') was incorporated into the genus. Description The species of ''Tecticornia'' grow as annual or perennial herbs, subshrubs or small shrubs. Stems are branched, glabrous and appear jointed. The opposite leaves are fleshy, glabrous, connate in the lower part and cup-like or collar-like stem-clasping, with minute (0–3 mm long) two-lobed to triangular leaf blades. The spike-shaped inflorescences consist of opposite bracts, mostly connate and stem-clasping, free in some species. Their blades are cup- or collar-like or deltoid to semi-circular scales. In the axil of each bract, there are three to five (rarely one or seven) flowers, free or sometimes fused to each other, to the bract, and to the inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tecticornia Halocnemoides
''Tecticornia halocnemoides'', commonly known as shrubby samphire or grey glasswort,* is a species of succulent, salt tolerant plant endemic to Australia. It grows as a spreading or erect shrub up to fifty centimetres high. It was first published as ''Arthrocnemum halocnemoides'' in 1845, but transferred into ''Halosarcia'' in 1980, and into ''Tecticornia ''Tecticornia'' is a genus of succulent, salt tolerant plants largely endemic to Australia. Taxa in the genus are commonly referred to as samphires. In 2007, the genus ''Halosarcia'', along with three other Australian genera (''Pachycornia'', ' ...'' in 2007. It is a highly variable species, with five published subspecies, some of which are themselves highly variable. These are ''T. halocnemoides'' subsp. ''halocnemoides'', ''T. halocnemoides'' subsp. ''caudata'', ''T. halocnemoides'' subsp. ''longispicata'', ''T. halocnemoides'' subsp. ''catenulata'' and ''T. halocnemoides'' subsp. ''tenuis''. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tecticornia Fimbrata
''Tecticornia'' is a genus of succulent, salt tolerant plants largely endemic to Australia. Taxa in the genus are commonly referred to as samphires. In 2007, the genus ''Halosarcia'', along with three other Australian genera (''Pachycornia'', ''Sclerostegia'' and ''Tegicornia'') was incorporated into the genus. Description The species of ''Tecticornia'' grow as annual or perennial herbs, subshrubs or small shrubs. Stems are branched, glabrous and appear jointed. The opposite leaves are fleshy, glabrous, connate in the lower part and cup-like or collar-like stem-clasping, with minute (0–3 mm long) two-lobed to triangular leaf blades. The spike-shaped inflorescences consist of opposite bracts, mostly connate and stem-clasping, free in some species. Their blades are cup- or collar-like or deltoid to semi-circular scales. In the axil of each bract, there are three to five (rarely one or seven) flowers, free or sometimes fused to each other, to the bract, and to the inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samphire
Samphire is a name given to a number of succulent salt-tolerant plants (halophytes) that tend to be associated with water bodies. * Rock samphire ('' Crithmum maritimum'') is a coastal species with white flowers that grows in Ireland, the United Kingdom and the Isle of Man. This is probably the species mentioned by Shakespeare in ''King Lear''. * Golden samphire (''Limbarda crithmoides'') is a coastal species with yellow flowers that grows across Eurasia. * Several species in the genus ''Salicornia'', known as "marsh samphire" in Britain. * '' Blutaparon vermiculare'', Central America, southeastern North America * '' Tecticornia'', Australia * '' Sarcocornia'', cosmopolitan Following the construction of the Channel Tunnel, the nature reserve created on new land near Folkestone made from excavated rock was named " Samphire Hoe", a name coined by Mrs Gillian Janaway. Etymology Originally "sampiere", a corruption of the French "Saint Pierre" (Saint Peter), samphire was named af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Marsh
A salt marsh, saltmarsh or salting, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides. It is dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs. These plants are terrestrial in origin and are essential to the stability of the salt marsh in trapping and binding sediments. Salt marshes play a large role in the aquatic food web and the delivery of nutrients to coastal waters. They also support terrestrial animals and provide coastal protection. Salt marshes have historically been endangered by poorly implemented coastal management practices, with land reclaimed for human uses or polluted by upstream agriculture or other industrial coastal uses. Additionally, sea level rise caused by climate change is endangering other marshes, through erosion and submersion of otherwise tidal marshes. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endorheic Basin
An endorheic basin ( ; also endoreic basin and endorreic basin) is a drainage basin that normally retains water and allows no outflow to other external bodies of water (e.g. rivers and oceans); instead, the water drainage flows into permanent and seasonal lakes and swamps that equilibrate through evaporation. Endorheic basins are also called closed basins, terminal basins, and internal drainage systems. Endorheic regions contrast with open lakes (exorheic regions), where surface waters eventually drain into the ocean. In general, water basins with subsurface outflows that lead to the ocean are not considered endorheic; but cryptorheic. Endorheic basins constitute local base levels, defining a limit of the erosion and deposition processes of nearby areas. Endorheic water bodies include the Caspian Sea, which is the world's largest inland body of water. Etymology The term ''endorheic'' derives from the French word , which combines ( 'within') and 'flow'. Endorheic lake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Lake
A salt lake or saline lake is a landlocked body of water that has a concentration of salts (typically sodium chloride) and other dissolved minerals significantly higher than most lakes (often defined as at least three grams of salt per liter). In some cases, salt lakes have a higher concentration of salt than sea water; such lakes can also be termed hypersaline lake, and may also be pink lakes on account of their color. An alkalic salt lake that has a high content of carbonate is sometimes termed a soda lake. Salt lakes are classified according to salinity levels. The formation of these lakes is influenced by processes such as evaporation and deposition. Salt lakes face serious conservation challenges due to climate change, pollution and water diversion. Classification The primary method of classification for salt lakes involves assessing the chemical composition of the water within the lakes, specifically its salinity, pH, and the dominant ions present. Subsaline Sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
