Definition of varve in English:

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varve

Pronunciation: /ˈvärv/

noun

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.
Example sentences
  • Each summer/winter pair of layers - called varves - would thus represent a single year.
  • The basal, coarse layer of a varve is commonly overlain by microlaminared silt and clay, reflecting variable streamflow during summer.
  • Analysis of varves (banded sediments in lakes that show annual variation) can be used to date Pleistocene sediments.

Derivatives

varved

adjective
Example sentences
  • Silt and varved clay, probably deposited during the last stages of Pleistocene glaciation, cover the entire floor.
  • 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.
  • Sediments in many proglacial lakes are varved (annually laminated) and thus offer the same temporal resolution as trees for paleoenvironmental studies.

Origin

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

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