Radiometric dating is a means of determining the "age" of a mineral specimen by determining the relative amounts present of certain radioactive elements. Radioactive dating techniques allowed a team led by Fred Jourdan of Curtin University in Perth to precisely measure the age of the eruptions of the Kalkarindji volcanic province, which saw lava cover an area of more than two million square kilometres in the Northern Territory and Western Australia.
The quantity of material needed for testing depends on the sample type and the technology being used. This result was uncalibrated, as the need for calibration of radiocarbon ages was not yet understood. Deep time Geological history of Earth Geological time units. What best describes you? When an organism dies, it ceases to take in new carbon, and the existing isotope decays with a characteristic half-life years.