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Deposition is the geological process where by material is added to a landform. This is the process by which wind and water create a deposit, through the laying down of granular material that has been eroded and transported from another geographical location. Image File history File links Question_book-3. ... This article includes a list of works cited but its sources remain unclear because it lacks in-text citations. ... A landform comprises a geomorphological unit, and is largely defined by its surface form and location in the landscape, as part of the terrain, and as such, is typically an element of topography. ... For morphological image processing operations, see Erosion (morphology). ...
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. The Needles, situated on the Isle Of Wight, are part of the extensive Southern England Chalk Formation. ... Calcium carbonate is a chemical compound, with the chemical formula CaCO3. ... For the SpongeBob SquarePants character, see Sheldon J. Plankton. ... In geology and oceanography, diagenesis is any chemical, physical, or biological change undergone by a sediment after its initial deposition and during and after its lithification, exclusive of surface alteration (weathering) and metamorphism. ...
All types of glacial deposits are called glacial drift, a term handed down from the 18th and early 19th centuries, when glacial deposits were considered to be the result of icebergs drifting in the Biblical flood.
There are two types of drift deposits: unstratified drift, or material deposited directly by a glacier, and stratified drift, or sediments washed from glaciers into meltwater streams and deposited as sand and gravel.
Kettles or kettleholes are depressions formed in deposits of stratified drift, caused by the melting of a large block of ice which had been buried in the sand and gravel.
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