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Thermoluminescence dating is a method for determining the age of objects containing crystalline minerals, such as ceramics or lava. These materials contain electrons that have been released from their atoms by ambient radiation, but have become trapped by imperfections in the mineral's structure. When one of these minerals is heated, the trapped electrons are discharged and produce light, and that light can be measured and compared with the level of surrounding radiation to establish the amount of time that has passed since the material was last heated (and its trapped electrons were last released).

Although this technique can date objects up to approximately 230,000 years ago, is only accurate on objects 300 to 10,000 years in age. This is, however, still over 4,000 years older than the young-earthers figure for the age of the earth12.(3)

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