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esker 音標拼音: ['ɛskɚ] n. 冰河砂堆 冰河砂堆 esker n 1: (geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets Eschar \Es"char\ ([e^]s"k[~e]r or [e^]s"k[aum]r), n. [Ir.]
(Geol.) In Ireland, one of the continuous mounds or ridges of gravelly and sandy drift which extend for many miles over the surface of the country, deposited by streams in meltwater channels under glaciers. Similar ridges in Scotland are called {kames} or {kams}. The spelling form {esker} is now the most commonly used, and the term is applied in geology to similar ridges created by glaciers anywhere in the world. Eskers vary in size and extent, but can be 100 feet high and up to 100 miles long. [Written also {eskar} and {esker}.] [1913 Webster PJC] Eskar \Es"kar\, or Esker \Es"ker\ ([e^]s"k[~e]r), n. (Geol.) See {Eschar}. [1913 Webster] |
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