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In the past, relative dating methods often were the only ones available to paleoanthropologists.As a result, it was difficult to chronologically compare fossils from different parts of the world.CATEGORY: geology DEFINITION: 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, by the melting of glaciers and is used in determining the age of geological formations and in archaeological dating, especially in northern Europe.These annual deposits are found in river and lake beds near glaciers, reflecting the fluctuation of the flow of water during periods of freezing and melting and especially useful in measuring recent Pleistocene geological events.Swedish pioneer Baron Gerard de Geer discovered in the late 19th century that these could be counted and correlated or linked over long distances, which gave him a timescale of 12,000 years and fixed the end of the Ice Age at about 10,000 years ago.CATEGORY: technique DEFINITION: A technique for producing chronometric dates based on the annual formation of layers of sediment on lake and river beds in glacial regions.what does varve analysis dating mean USA, Italy, United Kingdom , Canada, Germany, Australia, Spain, France, what does varve analysis dating mean Netherlands, Ireland, Switzerland, Japan, Denmark, Sweden, Austria, Norway, New Zealand, Greece, Belgium Arizona, what does varve analysis dating mean California, Colorado, District of Columbia, Florida, Georgia, Hawaii, Illinois, Indiana, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, Nevada, what does varve analysis dating mean New Mexico, NY, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Tennessee, Texas, Virginia, Washington, Wisconsin what does varve analysis dating mean New York, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, what does varve analysis dating mean Dallas, Detroit, San Jose, Indianapolis, Jacksonville, San Francisco, Hempstead, Columbus, Austin, Memphis, Baltimore, Charlotte, Fort Worth, Milwaukee, Boston, El Paso, Washington, Nashville-Davidson, Seattle, Denver, Las Vegas, Portland, Oklahoma City, Tucson, Albuquerque, Atlanta, Long Beach, Brookhaven, Fresno, New Orleans, Sacramento, Cleveland, Mesa, Kansas City, Virginia Beach, Omaha, Oakland, Miami, Tulsa, Honolulu, Minneapolis, Colorado Springs.
In many cases, however, it is possible to reconstruct the original sequence of strata so that they can be used for relative dating.
During the summer, melting accelerates, melt-water streams flow faster and carry more material.
The supply of sediment to the ice-marginal lake varies with the season.
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