Glossary of landform and geologic terms. 2013.
sand dune — Hill, mound, or ridge of windblown sand or other loose material such as clay particles. Dunes are commonly associated with desert regions and seacoasts, and there are large areas of dunes in nonglacial parts of Antarctica. * * * Introduction any … Universalium
Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… … Wikipedia
Sand-based athletic fields — are sporting grounds constructed on sand, which have certain advantages over those built on native soils. Highly maintained areas of turf, such as those on an athletic field or on golf greens and tees, can be grown in native soil or sand based… … Wikipedia
Sand Shiner — Scientific classification Kingdom: Animalia Phylum: Chord … Wikipedia
sand|glass — «SAND GLAS, GLAHS», noun. a device for measuring time by the flow of sand from one glass enclosure to another, especially an hourglass … Useful english dictionary
Sand River Convention — (1852) An agreement between Great Britain and the Boer population of the Transvaal. The agreement was brought about by the action of Sir Henry Smith, governor of the Cape Colony, in conquering the Orange River sovereignty on his own authority… … Encyclopedia of the Age of Imperialism, 1800–1914
Slow sand filter — Slow sand filters are used in water purification for treating raw water to produce a potable product. They are typically 1 to 2 metres deep, can be rectangular or cylindrical in cross section and are used primarily to treat surface water. The… … Wikipedia
Secondary flow — In fluid dynamics, a secondary flow is a relatively minor flow superimposed on the primary flow, where the primary flow usually matches very closely the flow pattern predicted using simple analytical techniques and assuming the fluid is inviscid … Wikipedia
heavy oil and tar sand — Introduction crude oils (crude oil) below 20° API gravity are usually considered to be heavy. The lighter conventional crudes are often waterflooded to enhance recovery. The injection of water into the reservoir helps to maintain reservoir… … Universalium
Electroosmotic flow — (or Electro osmotic flow, often abbreviated EOF) is the motion of liquid induced by an applied potential across a capillary tube or microchannel. Electroosmotic flow is an essential component in chemical separation techniques, notably capillary… … Wikipedia
