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单词 lake sediment
释义
lake sediment
The deposits are lake sediment, and are of uncertain age.
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The fenced-off area was then layered with mud, lake sediment, and decaying vegetation, eventually bringing it above the level of the lake.
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Subsidence of the caldera through time has been partly offset by the deposition of tephra, lava flows, and lake sediment.
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The valley floor owes its flatness to sediment deposited by these stands (the last glaciers in the valley were small and did not remove much old lake sediment).
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Ecological toxicity testing found that lake sediments were toxic to aquatic life.
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更新时间:2024/11/15 13:26:28