water sedimentation
41Carolina heelsplitter — Taxobox name = Carolina heelsplitter status = CR | status system = IUCN2.3 regnum = Animalia phylum = Mollusca classis = Bivalvia ordo = Unionoida familia = Unionidae genus = Lasmigona species = L. decorata binomial = Lasmigona decorata binomial… …
42sewage system — Collection of pipes and mains, treatment works, and discharge lines (sewers) for the wastewater of a community. Early civilizations often built drainage systems in urban areas to handle storm runoff. The Romans constructed elaborate systems that… …
43chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
44Rhein-Maas-Delta — Mündungsgebiet von Rhein und Maas. Im Vordergrund u. a. die Rotterdamer Hafenanlagen und der Haringvliet …
45Holocene Epoch — formerly Recent Epoch Latest interval of the Earth s geologic history, dating from 10,000 years ago to the present. The younger of the two epochs that constitute the Quaternary Period, the Holocene follows the last glacial stage of the… …
46Centrifugation — is a process that involves the use of the centrifugal force for the sedimentation of mixtures with a centrifuge, used in industry and in laboratory settings. More dense components of the mixture migrate away from the axis of the centrifuge, while …
47Passive margin — A passive margin is the transition between oceanic and continental crust which is not an active plate margin. It is constructed by sedimentation above an ancient rift, now marked by transitional crust. Continental rifting creates new ocean basins …
48Frecklebelly madtom — Conservation status Near Threatened ( …
49Silurian Period — Interval of geologic time, 443–417 million years ago. The third period of the Paleozoic Era, the Silurian follows the Ordovician Period and precedes the Devonian. It marks the first appearance of land plants and jawed fishes. The continents were… …
50Nam Theun 2 Dam — Nam Theun 2 …
