Deposition (geology)

Deposition is the geological process by which material is added to a landform or land mass. Geology (from Greek γη gê, "earth" and λόγος Logos, "speech" lit Fluids such as wind and water, as well as sediment gravity flows, transport previously eroded sediment, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment. In geology transportation refers to the movement of eroded debris whether by Rivers Glaciers Wind or Ocean currents and Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind

Deposition occurs when the forces responsible for sediment transportation are no longer sufficient to overcome the forces of particle weight and friction, which resist motion. Deposition can also refer to the build up of a sediment from organically derived matter or chemical processes. For example, chalk is made up partly of the microscopic calcium carbonate skeletons of marine plankton, the deposition of which has induced chemical processes (diagenesis) to deposit further calcium carbonate. Chalk (ʧɔːk is a soft white porous Sedimentary rock, a form of Limestone composed of the Mineral Calcite. Calcium carbonate is a Chemical compound with the Chemical formula Ca[[Carbon C]] O 3 Plankton consist of any drifting Organisms ( Animals Plants Archaea, or Bacteria) that inhabit the Pelagic zone of In Geology and Oceanography, diagenesis is any chemical physical or biological change undergone by a Sediment after its initial deposition and during Similarly, the formation of coal begins with the deposition of organic material, mainly from plants, in anaerobic conditions. For other uses of the term "hypoxia" see Hypoxia. Hypoxia or oxygen depletion is a phenomenon that occurs in aquatic environments

In Geology, cross-bedding refers to inclined sedimentary structures in a horizontal unit of rock In Geology and Oceanography, diagenesis is any chemical physical or biological change undergone by a Sediment after its initial deposition and during The term overbank describes the type of alluvial Geological deposit or sediment that is deposited on the Flood plain of a river Sedimentary rock is one of the three main rock types (the others being igneous and Metamorphic rock) A geologist is a contributor to the Science of Geology, studying the physical structure and processes of the Earth and planets of the solar system Shen Kuo or Shen Kua ( (1031&ndash1095 style name Cunzhong and pseudonym Mengqi Weng, was a Polymathic Chinese Georgius Agricola ( March 24, 1494 – November 21, 1555) was a German scholar and scientist

© 2009 citizendia.org; parts available under the terms of GNU Free Documentation License, from http://en.wikipedia.org
network: | |

See also