For what time is radiometric dating used for with igneous rocks

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While the uranium-lead system can measure intervals in the millions of years generally without problems from the intermediate isotopes, those intermediate isotopes with the longest half-lives span long enough time intervals for dating events less than several hundred thousand years ago. 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.

Because of the different number of protons, the daughter is a different element with different chemical properties than the parent. All normal matter, such as everything on Earth, the Moon, meteorites, etc. If this happens, then the date obtained will be older than the date at which the magma erupted.

How Do Scientists Determine the Age of Dinosaur Bones? - Carbonate A term used rather loosely in this context to describe deposits containing the carbonate anion.