When a rock is formed, it contains a certain number of radioactive atoms. The trapped charge accumulates over time at a rate determined by the amount of background radiation at the location where the sample was buried. Postcards from the Universe. Relative vs. As a substance ages, the relative amount of carbon decreases. Animals consume this carbon when they eat plants or other animals that have eaten plants. Radiogenic isotope geology 2nd ed.
This is the principle of cross-cutting relationships.
Radiometric Dating: Methods, Uses & the Significance of Half-Life
This in turn corresponds to a difference in age of closure in the early solar system. Jelsma; P. Radioactive carbon decays to stable nitrogen by releasing a beta particle. You are viewing lesson Lesson 6 in chapter 2 of the course:. Stanford, Calif.: UExcel Earth Science:
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