Fossil dating activity


20-Nov-2017 07:55

Potassium-40 is another radioactive element naturally found in your body and has a half-life of 1.3 billion years.

Other useful radioisotopes for radioactive dating include Uranium -235 (half-life = 704 million years), Uranium -238 (half-life = 4.5 billion years), Thorium-232 (half-life = 14 billion years) and Rubidium-87 (half-life = 49 billion years).

The country is the world’s third largest emitter of greenhouse gases and forecasters are anticipating its emissions could double as the country aims to lift millions out of poverty.

But solar consultancy firm Bridge to India, said India is expected to become the third biggest solar market in the world in 2017 with a capacity rise of 76 per cent compared to last year.

The use of various radioisotopes allows the dating of biological and geological samples with a high degree of accuracy.

However, radioisotope dating may not work so well in the future.

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Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence.Correlation can involve matching an undated rock with a dated one at another location.Suppose you find a fossil at one place that cannot be dated using absolute methods.For a fossil to be a good index fossil, it needs to have lived during one specific time period, be easy to identify and have been abundant and found in many places. If you find ammonites in a rock in the South Island and also in a rock in the North Island, you can say that both rocks are Mesozoic.

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Different species of ammonites lived at different times within the Mesozoic, so identifying a fossil species can help narrow down when a rock was formed.

He added: "We have seen strong and steady growth of the solar energy market in India to become one of the largest and strongest markets.



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