Geochronology is the study of the age of rocks, minerals, fossils, and sediments. It involves the use of various techniques to determine the absolute or relative age of geological materials. Some synonyms for the term geochronology include chronostratigraphy, geologic dating, geological time, and stratigraphy. Chronostratigraphy is a sub-discipline of geology that deals with the study of rock layers and their relationship to time. Geologic dating involves determining the age of rocks and sediments using radioactive isotopes or other dating techniques. Geological time refers to the sequence of events that have occurred over geologic time scales, whereas stratigraphy is the study of the arrangement and succession of rock layers.