water sedimentation
61Sédiment — Le processus de sédimentation est d abord une loi physique, liée à la pesanteur. Des phénomènes biologiques peuvent l accélérer ou le réduire, intervenant notamment dans les cycles écologiques et biogéochimiques …
62centrifuge — centrifugation /sen trif yeuh gay sheuhn, trif euh /, n. /sen treuh fyoohj /, n., v., centrifuged, centrifuging. n. 1. an apparatus that rotates at high speed and by centrifugal force separates substances of different densities, as milk and cream …
63reservoir — /rez euhr vwahr , vwawr , vawr , rez euh /, n. 1. a natural or artificial place where water is collected and stored for use, esp. water for supplying a community, irrigating land, furnishing power, etc. 2. a receptacle or chamber for holding a… …
64Mineral processing — Crushing, a form of comminution, one of the unit operations of mineral processing In the field of extractive metallurgy, mineral processing, also known as mineral dressing or ore dressing, is the process of separating commercially valuable… …
65Pleistocene Epoch — Earlier and longer of the two epochs that constitute the Quaternary Period. The Pleistocene began с 1.8 million years ago and ended с 10,000 years ago. It was preceded by the Pliocene Epoch of the Tertiary Period and followed by the Holocene… …
66Nam Theun II Hydropower Project — Nam Theun II or NT2 is a hydropower project under construction on the Nam Theun river in Laos, with commissioning planned for 2009. The scheme will divert water from the Nam Theun, a tributary of the Mekong River, to the Xe Bang Fai river, with… …
67Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… …
68Western Africa — ▪ region, Africa Introduction region lying south of the Sahara and east and north of the Atlantic Ocean. It is latitudinally divided into two parallel belts of land: the western portion of the Sudan, a geographic area that stretches across… …
69Mudrock — Glacial Lake Missoula claystone Red mudrock in the Ragged Reef Formation ( …
70Windermere supergroup — The Windermere supergroup is a geological unit formed during the Ordovician to Silurian periods Ma|450, and exposed in the north west of England, including the Pennines and correlates along its strike, in the Isle of Man and Ireland, and down dip …
