Dating different fossil technique

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Carbon-14 is also passed onto the animals that eat those plants.

After death the amount of carbon-14 in the organic specimen decreases very regularly as the molecules decay.

Sterkfontein has produced some of the most famous hominid fossils in the world, together with a range of other fossils of animals and plants.

The site has a very high concentration of fossils – the highest in the Cradle of Humankind – which, as a whole, has produced more fossils of early hominids than any other site on Earth.

Presumably if all the world’s outcrops were integrated, sediments representing all of geologic time would be available for examination.

Precambrian rocks must therefore be correlated by means of precise isotopic dating.

The answer is that you use radioactive carbon dating to get the dates. But other methods have also been used to date the fossil record.

The Fossils Sequence Record It was the study of rock layers in England near the beginning of the 19th century that lead to the study of paleontology and from there to the study of fossils.

Early geologists, at the end of the 18th and early 19th century noticed how fossils appeared in certain sequences: some fossil assemblages were always found below other assemblages, not above.

This meant that the ones below were older than the ones on top.

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