Peat deposits, formation requirements

Coals are generated by burial of peats, which are formed in swamps and marshes. Geographic and tectonic requirements for formation of thick peat deposits include slow subsidence, protection of the swamp from erosion by marine inundation or fluvial flood waters and a restricted supply of fluvial sediment. These requirements are met on coastal plains where most Recent peat swamps are located. Microbial activity is capable of degrading great quantities of the plant material which is the ultimate source of peat. Therefore, conditions which inhibit microbial activity are favorable for the... 

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