Archaeological scientific dating techniques korean and chinese dating

Potassium-argon (K-Ar) dating is a radiometric technique that is used to determine the age of minerals that contain potassium, which include clay minerals and micas.It is most useful for minerals older than 100,000 years and can reach way back into the geological past.In the 21st century, the different methods of archaeology include high-tech analysis of archaeological sites with magnetic equipment, electrical sensors, and even satellite photography.Specialized methods such as underwater archaeology, urban archaeology and rescue archaeology are employed for sites in unusual locations.

When the grain is exposed to intense light of particular wavelengths in the laboratory, it emits a light signal with an intensity proportional to the radiation it has absorbed while buried.For sites located within modern cities, for example, urban archaeology is employed; this method involves disturbing the surrounding businesses and homes as little as possible, and coordinating efforts with city governments to protect the site during survey and excavation.If a site is in imminent danger of being destroyed by development, archaeologists will use a more rapid method called rescue archaeology.The measurement is based on an isotope of potassium that radioactively decays at a known rate into argon.K-Ar dating has been used to date lava flows above and below archaeological deposits that contain important hominid fossils in Africa's Olduvai Gorge.

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