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单词 gyttja
释义 gyttja Geol.|ˈjɪtʃə|
Also gytje.
[Sw., = mud, ooze (adopted in its technical sense by H. A. von Post 1862, in K. Sven. Vetenskaps-Akad. Handl. 1).]
A sediment which is typically black, rich in organic matter, and deposited in productive lakes.
1887Encycl. Brit. XXII. 740/1 In the shallow lakes and enclosed bays of the sea there began to be formed and still is in course of formation a deposit known by the name gyttja, characterized by the diatomaceous shells it contains.1899Jrnl. Chem. Soc. LXXVI. ii. 39 At Sandefjord the gytje is greasy to the touch, and has the odour of hydrogen sulphide; it is used for mud baths.1958F. E. Zeuner Dating Past (ed. 4) iii. 90 There is about one metre of blue lake marl below the polliniferous gyttja.1970Nature 19 Sept. 1235/1 At a few places, however, there are thin gyttja-like layers a few centimetres thick, which could have formed in pools over permafrost.
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更新时间:2025/2/24 21:19:03