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evaporites
Book article from: The Oxford Companion to the Earth
evaporites Evaporite deposits are sediments of economic importance...Caspian Sea. The cyclical nature of evaporite sequences supports this conclusion...Although some basins contain complete evaporite sequences, many ancient sequences display...
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Sinkholes
Encyclopedia entry from: The Gale Encyclopedia of Science
...such as limestone and dolomite, or evaporite rock, such as gypsum and salt. Carbon...lower groundwater levels. In areas where evaporite rock is common, human activities play...rocks. Salt mining and drilling into evaporite deposits allows water that is not already...
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sulphate minerals
Book article from: The Oxford Companion to the Earth
...volume, which often results in intense deformation of the evaporite bed. Under certain conditions the growth of gypsum, resulting...usually has a characteristic pale blue colour. It occurs as an evaporite mineral associated with gypsum and halite, in veins of hydrothermal...
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Deposit
Encyclopedia entry from: The Gale Encyclopedia of Science
...United States. The Bonneville Salt Flats in Utah is a good example of an “ evaporite ” mineral deposit. Due to the arid climate, evaporite minerals are still being deposited today at Great Salt Lake in Utah. The term...
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chemistry of geothermal waters and hydrothermal alteration
Book article from: The Oxford Companion to the Earth
...soluble salts in the rock has a profound effect on the concentration of dissolved solids in the water. Certain rocks, such as evaporite sediments, are solely composed of soluble salts. Water associated with such rocks is hypersaline and referred to as brine...
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sediment
Book article from: The Columbia Encyclopedia, Sixth Edition
...form a more or less chemically pure layer of sediment. For example, evaporation in shallow basins results in a sequence of evaporite sediments, which include gypsum and rock salt. Organic sediments are formed as a result of plant or animal actions; for...
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rivers
Book article from: The Oxford Companion to the Earth
...contributions of the three main rock-types, carbonates, silicates, and evaporites, are shown in Table 1. The contribution of evaporite rocks is significant despite the fact that they cover only 1–2 per cent of the surface of the continents. This...
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erosion
Book article from: The Oxford Companion to the Earth
...weathering entails the chemical breakdown of bedrock minerals by water; it can also operate alone, as when carbonate or evaporite deposits dissolve. For much of the Earth's surface, however, physical and chemical weathering act in concert. When liquid...
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Messinian salinity crisis
Book article from: The Oxford Companion to the Earth
...series of brackish and freshwater lakes, linked perhaps to the Paratethys Sea in the east. Salt precipitation ceased and the evaporite beds were sealed over with thin, shaly coverings. The end of the salt basin came when the Straits of Gibraltar, and perhaps...
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aquifer
Book article from: The Oxford Companion to the Earth
...as silt and clay can lead to compaction of the confining unit and subsidence of the land surface. Confining units such as evaporite deposits that neither transmit nor store significant quantities of water are sometimes called aquifuges . Perched aquifers...
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