Science of determining the age of geological structures, rocks, and fossils, and placing them in the context of geological time. The techniques are of two types: relative dating and absolute dating. Relative dating can be carried out by identifying fossils of creatures that lived only at certain times (marker fossils), and by looking at the physical relationships of rocks to other rocks of a known age.
Absolute dating is achieved by measuring how much of a rock’s radioactive elements have changed since the rock was formed, using the process of radiometric dating. + prikaži više