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varve dating

varve dating (geochronology) An absolute dating technique using thin sedimentary layers of clays called varves. The varves, which are particularly common in Scandinavia, have alternate light and dark bands corresponding to winter and summer deposition. Most of them are found in the Pleistocene series, where the edges of varve deposits can be correlated with the annual retreat of the ice sheet, although some varve formation is taking place in the present day. By counting varves it is possible to establish an absolute time scale for fossils up to about 20 000 years ago.

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"varve dating." A Dictionary of Biology. . Encyclopedia.com. 25 Sep. 2017 <http://www.encyclopedia.com>.

"varve dating." A Dictionary of Biology. . Encyclopedia.com. (September 25, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/varve-dating

"varve dating." A Dictionary of Biology. . Retrieved September 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/varve-dating

varve

varve A banded layer of silt and sand deposited annually in lakes, especially near to ice sheets. The coarse, paler material is deposited in summer; the finer, darker material in winter. One varve consists of one light band and one dark band. Varves can be counted to calculate the age of glacial deposits (varve analysis, also called varve chronology or varve count). Since the pattern of thicknesses of successive varves is often distinctive, correlations can be made between widely separated deposits, using the same principle as that of dendrochronology.

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"varve." A Dictionary of Earth Sciences. . Encyclopedia.com. 25 Sep. 2017 <http://www.encyclopedia.com>.

"varve." A Dictionary of Earth Sciences. . Encyclopedia.com. (September 25, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/varve

"varve." A Dictionary of Earth Sciences. . Retrieved September 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/varve

varve

varve A banded layer of silt and sand deposited annually in lakes, especially near to ice sheets. The coarse, paler material is deposited in summer; the finer, darker material in winter. One varve consists of one light band and one dark band. Varves can be counted to calculate the age of glacial deposits (varve analysis, also called varve chronology or varve count). Since the pattern of thicknesses of successive varves is often distinctive, correlations can be made between widely separated deposits, using the same principle as that of dendrochronology.

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"varve." A Dictionary of Ecology. . Encyclopedia.com. 25 Sep. 2017 <http://www.encyclopedia.com>.

"varve." A Dictionary of Ecology. . Encyclopedia.com. (September 25, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/varve-0

"varve." A Dictionary of Ecology. . Retrieved September 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/varve-0

varve

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.

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"varve." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 25 Sep. 2017 <http://www.encyclopedia.com>.

"varve." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (September 25, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/varve

"varve." The Columbia Encyclopedia, 6th ed.. . Retrieved September 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/varve