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单词 varve
释义

Definition of varve in English:

varve

noun vɑːvˈvärv
Geology
  • A pair of thin layers of clay and silt of contrasting colour and texture which represent the deposit of a single year (summer and winter) in a lake. Such layers can be measured to determine the chronology of glacial sediments.

    〔地质〕季候泥,纹泥;(季候泥,纹泥)年层

    Example sentencesExamples
    • The basal, coarse layer of a varve is commonly overlain by microlaminared silt and clay, reflecting variable streamflow during summer.
    • Some investigators believe the laminated clays are varves and that each couplet represents one year of seasonal deposition.
    • Analysis of varves (banded sediments in lakes that show annual variation) can be used to date Pleistocene sediments.
    • Each summer/winter pair of layers - called varves - would thus represent a single year.
    • These sediments, called varved clays or simply varves, are the primary habitat of Axarus larvae.

Derivatives

  • varved

  • adjective
    Geology
    • Silt and varved clay, probably deposited during the last stages of Pleistocene glaciation, cover the entire floor.
      Example sentencesExamples
      • Axarus larvae almost always infest varved clay deposits that are remnants of Pleistocene glacial lakes.
      • Sediments in many proglacial lakes are varved (annually laminated) and thus offer the same temporal resolution as trees for paleoenvironmental studies.
      • In glacial terrains coarse-grained, so-called Gilbert-type deltas of gravels and sands are common, and these pass in deeper water into varved sediments.
      • We have obtained and analyzed cores of varved sediments from Cheakamus, Green, and Glacier lakes.

Origin

Early 20th century; from Swedish varv 'layer'.

Definition of varve in US English:

varve

nounˈvärv
Geology
  • A pair of thin layers of clay and silt of contrasting color and texture that represent the deposit of a single year (summer and winter) in a lake. Such layers can be used to determine the chronology of glacial sediments.

    〔地质〕季候泥,纹泥;(季候泥,纹泥)年层

    Example sentencesExamples
    • The basal, coarse layer of a varve is commonly overlain by microlaminared silt and clay, reflecting variable streamflow during summer.
    • Some investigators believe the laminated clays are varves and that each couplet represents one year of seasonal deposition.
    • Analysis of varves (banded sediments in lakes that show annual variation) can be used to date Pleistocene sediments.
    • Each summer/winter pair of layers - called varves - would thus represent a single year.
    • These sediments, called varved clays or simply varves, are the primary habitat of Axarus larvae.

Origin

Early 20th century; from Swedish varv ‘layer’.

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更新时间:2025/1/15 2:58:41