Remanent magnetization in ancient rocks that records the orientation of the earth's magnetic field and can be used to determine the location of the magnetic poles and the latitude of the rocks at the time the rocks were formed parent isotope: The Success Code. Gradstein, F. The GPTS is divided into periods of normal polarity and reversed polarity. The mass of an isotope of an electron, based on the number of protons and neutrons atomic nucleus:
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Fossils became an important in earth history.
Dating of rocks fossils and geologic events answers
Most isotopes found on Earth are generally stable and do not change. Ludwig, K. Radiometric dating ofand the earth this lab review: