varve

(redirected from Varves)
Also found in: Dictionary, Wikipedia.

varve,

in geology, pair of thin sedimentary layers formed annually by seasonal climatic changes. Usually found in glacial lake deposits, varves consist of a coarse-grained, light-colored summer deposit and a finer-grained, dark-colored winter deposit formed when fine sediment settles out from the water under the ice cover. Varves, and the pollen they contain, are useful for interpreting recent climatic history.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

varve

[′värv]
(geology)
A sedimentary bed, layer, or sequence of layers deposited in a body of still water within a year's time, and usually during a season. Also known as glacial varve.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
These tree-ring data and varve data from leaves are simply excellent to tie together the varve data to tree-ring data, because there are 4,000 years of overlap.
Schimmelmann, "Varves in lake sediments--a review," Quaternary Science Reviews, vol.
Comparing the varves with the ice cores from Greenland - they are a good record of ancient atmospheric conditions, including volcanic explosions - showed that the thicker varve layers happened in the years of heightened explosive volcanic activity.
We interpret these laminations as varves, or annual layers, with the clay cap representing slow deposition of the finest suspended sediment fraction in the lake water column during winter, and the abrupt transition to the next, darker and coarser layer representing the onset of breakup.
If the rhythmites are indeed varves, the count of 507 varves from OM is a minimum estimate of years of sedimentation.
5) as sediment becomes finer and well-laminated showing 'varve'-like couplets of alternating grain size and colour.
It is impossible to create an accurate calibration curve based on the varves if you do not know precisely how big the gaps in the soil are.
Barton, D.G., and Wilson, M.V.H., 2005, Taphonomic variations in Eocene fish-bearing varves at Horsefly, British Columbia, reveal 10 000 years of environmental change: Canadian Journal of Earth Sciences, v.
The team studied layers of sediments known as varves, which they said were analogous to tree rings, to give an estimated age for the Parallel Roads.
Somebody can say to you that the lake bed is made up of annual layers - I think the technical term is varves - but Adrian knows the core so well he can point to a pale layer and say 'that's the big flood of 18-whatever', and talk you through 2000 years of history."
The thickness of varves is variable, depending on the cyclicity of sedimentation.