Varve dating definition
But as with tree rings (see dendrochronology) the varves will vary from year to year, depending on the rapidity of the thaw, quantity of summer rain, winter snow, etc., the variations showing some correlation with the sunspot cycle.Such varve chronologies have been built up for Scandinavia and are used to date the retreat of the Weichselian ice-sheet.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.The methods have varying applications, accuracy, range, and cost.Many new techniques are being developed and tested.
By counting varves it is possible to establish an absolute time scale for fossils up to about 20 000 years ago.During the winter, ice melting is very slow, melt-water streams do not contain much water, and they flow slowly, carrying little material.During the summer, melting accelerates, melt-water streams flow faster and carry more material.SYNONYMS OR RELATED TERMS: chronology CATEGORY: technique DEFINITION: The process by which an archaeologist determines dates for objects, deposits, buildings, etc., in an attempt to situate a given phenomenon in time., in which figures in solar years (often with some necessary margin of error) can be applied to a particular event.
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