Description: Currently you are watching Luminescence dating and modern human origins porn video uploaded to: Mom porn category. You can find more videos like Luminescence dating and modern human origins below in the related videos section. Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating. It is useful to geologists and archaeologists who want to know when such an event occurred. It uses various methods to stimulate and measure luminescence. All sediments and soils contain trace amounts of radioactive isotopes of elements such as potassium , uranium , thorium , and rubidium. These slowly decay over time and the ionizing radiation they produce is absorbed by mineral grains in the sediments such as quartz and potassium feldspar. An understanding of the potential and limitations of luminescence dating should help students of human origins judge its value and evaluate its applications.
Added: 23.04.2019 at 18:46
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