water sedimentation
121QUATERNAIRE (ÈRE) — Le terme «Quaternaire» a été créé en 1829 par le géologue français Jules Desnoyers. Il s’agit de la période de temps la plus récente et la plus courte de l’échelle géologique. Constituant la dernière époque du Cénozoïque et des temps… …
122Clarifying agent — Clarifying agents are used to remove suspended solids from liquids during flocculation. Contents 1 Process 2 Agents 3 See also 4 References …
123Ostwald ripening — Basic schematic of the Ostwald ripening process Ostwald ripening is an observed phenomenon in solid solutions or liquid sols which describes the change of an inhomogeneous structure over time. In other words, over time, small crystals or sol… …
124Persian Gulf — an arm of the Arabian Sea, between SW Iran and Arabia. 600 mi. (965 km) long. Also called Arabian Gulf. * * * Arm of the Arabian Sea. It is 550 mi (885 km) long and has an average depth of 328 ft (100 m). It is connected with the Gulf of Oman and …
125Coral bleaching — Bleached branching Acropora sp. at Heron Island, Great Barrier Reef, in 2005 …
126Geology of the Death Valley area — The exposed geology of the Death Valley area presents a diverse and complex story that includes at least 23 formations of sedimentary units, two major gaps in the geologic record called unconformities, and at least one distinct set of related… …
127Barrage de Petit-Saut — Géographie Pays …
128concentration — 1. A preparation made by extracting a crude drug, precipitating from the solution, and drying. 2. Increasing the amount of solute in a given volume of solution by evaporation of the solvent. 3. The quantity of a substance per unit …
