Referencing the diagram above, use the following information to answer the quest

Question

Referencing the diagram above, use the following information to answer the question. You're an archaeologist working m Peru. South America and you find a skeleton in layer B. You determine it is an undiscovered primate species because of its opposable thumbs and lack of a tail. You're trying to decide what type of dating method is appropriate. You recall finding a fossil in layer C known to be 200,000 years old. You discover another fossil in layer D that dates back to 2 million years ago. Given this information, which method would you use to date the skeleton? Tinder C14 dating Potassium-Argon dating.

Explanation / Answer

potassium argon method..... ordinary potassium contains about 0.01%radioactive isotopes which disintegrates with a half life of 1.3*10^9 years to give rise to calcium and argon. This property has been utilised to find the absolute age of the earliest fossil hominids of East Africa this age was found to be 2,000,000

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