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The age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 10⁹ years ± 1%).

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The spontaneous transformation of an unstable atomic nucleus into a lighter one

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another term for carbon dating.

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a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.

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An idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion.

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The history of Earth concerns the development of planet Earth from its formation to the present day.

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The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.

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The time taken for the radioactivity of a specified isotope to fall to half its original value.

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In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil

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The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time.