His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.
Rocks are made up of many individual crystals, and each crystal is usually made up of at least several different chemical elements such as iron, magnesium, silicon, etc.
Most of the elements in nature are stable and do not change.
Knowing the actual date of an event allows us to say exactly how old something is or how long ago it actually took place. What can radiometric dating tell us about the age of rocks that the Law of Superposition cannot?
Radiometric dating tells us how old the rocks are whereas the Law of Superposition can only be used to determine the relative age 3.
He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.