Carbon 14 radiometric dating is used for

Where t is the age of the fossil (or the date of death) and ln() is the natural logarithm function.

If the fossil has 35% of its carbon 14 still, then we can substitute values into our equation.

After 5,730 years, the amount of carbon 14 left in the body is half of the original amount.

If the amount of carbon 14 is halved every 5,730 years, it will not take very long to reach an amount that is too small to analyze.

Index fossils are fossils that are known to only occur within a very specific age range.

Typically commonly occurring fossils that had a widespread geographic distribution such as brachiopods, trilobites, and ammonites work best as index fossils.

Radiocarbon dating can be used on samples of bone, cloth, wood and plant fibers.

Scientists can use certain types of fossils referred to as index fossils to assist in relative dating via correlation.So, the fossil is 8,680 years old, meaning the living organism died 8,680 years ago. There are two main methods determining a fossils age, relative dating and absolute dating.The majority of the time fossils are dated using relative dating techniques.Using relative dating the fossil is compared to something for which an age is already known.

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