The unstable and radioactive carbon 14, called radiocarbon, is a naturally occurring isotope of the element carbon. Chemical Geology. With the development of AMS in the s it became possible to measure these isotopes precisely enough for them to be the basis of useful dating techniques, which have been primarily applied to dating rocks. Deep time Geological history of Earth Geological time units. This field is known as thermochronology or thermochronometry. Jump to:
If a material that selectively rejects the daughter nuclide is heated, any daughter nuclides that have been accumulated over time will be lost through diffusionsetting the isotopic "clock" to zero.
Principles of Radiometric Dating. It is not always possible to recognize re-use. Cancel Save. Samples that have been radiocarbon dated since the inception of the method include charcoalwoodtwigs, seedsbonesshellsleather, peatlake mud, soilhair, potterypollenwall paintings, corals, blood residues, fabricspaper or parchment, resins, and wateramong others.