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It is only useful for once-living things which still contain carbon, like flesh or bone or wood.

Rocks and fossils, consisting only of inorganic minerals, cannot be dated by this scheme.

is carbon dating used to measure the age of rocks-83

When these neutrons collide with nitrogen-14 in the atmosphere carbon-14 can be created.Perhaps no concept in science is as misunderstood as "carbon dating." Almost everyone thinks carbon dating speaks of millions or billions of years.But, carbon dating can't be used to date either rocks or fossils.Carbon-14 is created from nitrogen-14 in the upper atmosphere of the earth.Radiation from the sun collides with atoms in the atmosphere.




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Even the use of isochron dating, which is supposed to eliminate some initial condition assumptions, produces dates that are not reliable.


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Organisms at the base of the food chain that photosynthesize – for example, plants and algae – use the carbon in Earth’s atmosphere.


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