is the science of arranging events in their order of occurrence in time.
Consider, for example, the use of a timeline or sequence of events.
The study of the means of placing pottery and other cultural artifacts into some kind of order proceeds in two phases, classification and typology: Classification creates categories for the purposes of description, and typology seeks to identify and analyse changes that allow artifacts to be placed into sequences.
Laboratory techniques developed particularly after mid-20th century helped constantly revise and refine the chronologies developed for specific cultural areas.
It was used systematically for the first time only about the year 400, by the Iberian historian Orosius.
Pope Boniface IV, in about the year 600, seems to have been the first who made a connection between these this era and Anno Domini.
Therefore, if we know the 14C: Unfortunately, neither are straightforward to determine.
Carbon dioxide is used in photosynthesis by plants, and from here is passed through the food chain.In the field of Egyptology, William Flinders Petrie pioneered sequence dating to penetrate pre-dynastic Neolithic times, using groups of contemporary artefacts deposited together at a single time in graves and working backwards methodically from the earliest historical phases of Egypt. Known wares discovered at strata in sometimes quite distant sites, the product of trade, helped extend the network of chronologies.Some cultures have retained the name applied to them in reference to characteristic forms, for lack of an idea of what they called themselves: "The Beaker People" in northern Europe during the 3rd millennium BCE, for example.Dionysius Exiguus (about the year 500) was the founder of that era, which is nowadays the most widespread dating system on earth.An epoch is the date (year usually) when an era begins. It was used to identify the Roman year by a few Roman historians.Unrelated dating methods help reinforce a chronology, an axiom of corroborative evidence.