Do scientists use carbon dating dinosaurs
Radiocarbon is not used to date the age of rocks or to determine the age of the earth.Other radiometric dating methods such as potassium-argon or rubidium-strontium are used for such purposes by those who believe that the earth is billions of years old.
If the clock is not set to zero when a deposit forms, then there can be no starting point from which to calculate the age of a deposit.
This assumption is backed by numerous scientific studies and is relatively sound.
However, conditions may have been different in the past and could have influenced the rate of decay or formation of radioactive elements.
It is assumed that we are dealing with a closed system—no loss of either parent or daughter elements has occurred since the study material formed.
No scientist can guarantee that any sample can be considered a closed system unless it was isolated from its environment when it was formed.
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Carbon-14 comes from nitrogen and is independent of the carbon-12 reservoir.