Absolute age (Absolute age) refers to the period of time that can indicate a certain age, such as age of fossils of stone or objects which can find from the style or geological events (mostly told the age is a number, measure be the year such as thousands year,millions years) to age, generally refers to the find the age from analysis and calculation were obtained from isotopes. Mixed assembly of radioactive elements in rock or fossil or an object that is up to how and half life (Half. Life period) of the element.