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单词 gyttja
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gyttja

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gyttja

Part of them, developed from highly calcareous gyttja, may be called limnic rendzinas.The eemian gyttja was used as a foundation in the engineering construction.They consisted of three different types of gyttja (fine grain-size, clayey-calcareous,clayey).Two cores of clay-gyttja with an intervening sand layer were analysed for diatoms and pollen.The section consists of fine organic sand, silt with organic matter and gyttja.Present-day organic-rich sediments have been described both in fresh (‘gyttja') and brackish or saline waters mostly in the boreal zones.The organic matter and fibre contents of the gyttja were > 45 %, and both decreased with depth.More than 50% of peatlands developed on organic gyttja, 27% on calcareous gyttja,and almost 14% on mineral gyttja.
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更新时间:2025/3/11 23:18:02