On the other hand, the half-life of the isotope potassium 40 as it decays to argon is 1. Ferzu is? First Name. Throughout the history of life, different organisms have appeared, flourished and become extinct.
Absolute Dating Absolute dating is used to determine a precise age of a rock or fossil through radiometric dating methods. Based on the Rule of Superposition, certain organisms clearly lived before others, during certain geologic times. If conditions are right the remains of the dying organisms can then be preserved as fossils within the rock that formed from sediments that covered the remains.