Carbon, the radioactive isotope of carbon used in carbon dating has a half-life of years, so it decays too fast. By correlating the rings with dead wood found near the trees and beams from local buildings, a chronology of 11, rings has been suggested. However, there are many methods that can be used to determine the age of the earth or other objects. The facts from the rock layers do not speak for themselves—they must be interpreted. The decay rate or half—life of the parent isotope has remained constant since the rock was formed. Native to the mountains of California and Nevada, the oldest tree has been dated at 4, years old. Do all scientists accept the carbon dating method as reliable and accurate? As the uranium decays, helium is produced in the crystals. The Wheeler Formation has been previously dated to approximately million year old, so we know the trilobite is also about million years old. Using relative dating the fossil is compared to something for which an age is already known.
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