Category
page 1Peatlands
Vasyugan Swamp
swamp in Russia
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peatland
thumb|A variety of mire types in Carbajal Valley, Argentina
thumb|right|Avaste Nature Reserve|Avaste Fen, one of the largest fens in Estonia
thumb|right|A valley mire creates a level ground surface in otherwise dramatic topography. Upper Bigo Bog, Rwenzori Mountains, [[Uganda.]]
A peatland is a type of wetland whose soils consist of organic matter from decaying plants, forming layers of peat. Peatlands arise because of incomplete decomposition of organic matter, usually litter from vegetation, due to water-logging and subsequent anoxia. Peatlands are unusual landforms that derive mostly from b