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Parna (geology)
Parna is a windblown sediment, in many ways similar to loess. It is found in the Riverina Plains, in south-east Australia. It was named by Bruce Butler, a pedologist working for CSIRO in 1956. Parna is an aeolian deposit, like loess, but the particles are small clay mineral agglomerates. The material sources are dried up lakes and river floodplains. It has been described as calcareous red clay material, of aeolian origin, that blankets large parts of the Murrumbidgee and Murray River valleys. Cattle,S.R.,Greene,R.S.B.,McPherson,A.A. 2005. Aeolian dust deposition in south east Australia: impacts on salinity and erosion. crcleme.org.au/Pubs/Monographs/regolith2005/Cattle_et_al.pdf References Clay minerals group {{silicate-mineral-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loess
Loess (, ; from german: Löss ) is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. Ten percent of Earth's land area is covered by loess or similar deposits. Loess is a periglacial or aeolian (windborne) sediment, defined as an accumulation of 20% or less of clay and a balance of roughly equal parts sand and silt (with a typical grain size from 20 to 50 micrometers), often loosely cemented by calcium carbonate. It is usually homogeneous and highly porous and is traversed by vertical capillaries that permit the sediment to fracture and form vertical bluffs. Properties Loess is homogeneous, porous, friable, pale yellow or buff, slightly coherent, typically non- stratified and often calcareous. Loess grains are angular, with little polishing or rounding, and composed of crystals of quartz, feldspar, mica and other minerals. Loess can be described as a rich, dust-like soil. Loess deposits may become very thick, more than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CSIRO
The Commonwealth Scientific and Industrial Research Organisation (CSIRO) is an Australian Government The Australian Government, also known as the Commonwealth Government, is the national government of Australia, a federal parliamentary constitutional monarchy. Like other Westminster-style systems of government, the Australian Government ... agency responsible for scientific research. CSIRO works with leading organisations around the world. From its headquarters in Canberra, CSIRO maintains more than 50 sites across Australia and in France, Chile and the United States, employing about 5,500 people. Federally funded scientific research began in Australia years ago. The Advisory Council of Science and Industry was established in 1916 but was hampered by insufficient available finance. In 1926 the research effort was reinvigorated by establishment of the Council for Scientific and Industrial Research (CSIR), which strengthened national science leadership and increased ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
