Dating techniques for fossils

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Carbon-14, though, is continuously created through collisions of neutrons generated by with nitrogen in the and thus remains at a near-constant level on Earth. Archaeologists also regularly employ , , , and. However, the date of retrieval is often important.

Chemicals and minerals percolate through the sediment and the original bone or shell gradually recrystallizes. The shorter the half-life, the more likely the atom will decay.

Accuracy of Fossils and Dating Methods - Changes in pollen zones can also indicate changes in human activities such as massive deforestation or new types of farming. The facts from the rock layers do not speak for themselves—they must be interpreted.