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DATING METHODS add details regarding the different methods and what they…

- - - - used to examine biological remains
    - - it can date back to 62,000 years
    - - can produce an accurate time frame
    - - if there isn't much radio carbon, the specimen is hard to examine
  - - - Accelerator mass spectrometry (AMS) uses the carbon 14 present in samples to date it. It can be used on practically anything as it is so sensitive (e.g. wood, blood particles, sand, drains, seeds, bones, sediments and charcoal). It has also been used outside the field of archeology, geology and oceanic research, in biomedical labs for drug discovery.
    - - It can reliably date back around 50,00 years ago.
    - - It is very sensitive and not destructive and so has been able to revolutionise the dating possibilities. It can date very small samples and in a very short period of time.
    - - It is a costly technique. Also, due to small sample sizes contamination is difficult to control.
  - - - Used to determine the amount of calcium carbonate in objects such as coral and speleothem (crystals).
    - - It’s half life is about 4.5 million years.
    - - Is able to more accurately date specimens that are from millions of years ago.
    - - If specimens are found close to our current time, the uranium is not very accurate for dating.