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My work focuses on the interface between chemistry and two other disciplines, geology and archaeology or paleoanthropology.
A relatively new way of determining the age of materials is to look at radiation damage caused by radioisotopes in the material itself and in its surroundings.
Oversimplified, the longer something has been buried, the more damage should be found.
Although the method is still in a rapid phase of development, it has demonstrated its value by providing new chronological evidence about the evolution of modern humans.Geological applications have included following the rise and fall of sea levels due to ice ages by dating shells of species known to live in shallow water, or looking at sediments buried by glaciers during ice ages.