Ice Layering

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Ice layering is a phenomenon that is almost universally observed in ice sheets and glaciers where the average temperature does not rise above freezing.

Annual differences in temperature and irradiation cause ice to form differently from year to year, and this generates alternating layers of light and dark ice. This method is considered a relatively accurate way to measure the age of an ice sheet, as only one layer will form per year. While there have been a few cases where several layers have formed per year, these incidents do not challenge the ability of ice layering to provide a minimum age, as these false layers can be discerned from the real thing upon close inspection.

Currently, the greatest number of layers found in a single ice sheet is over 700,000, which clearly contradicts the idea of an earth less than 10,000 years old.(1)

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