See also: Period
A geological period , or more simply period , is a division of a era on the geological time scale. It is the temporal equivalent of the “Système” used in Stratigraphie to define the Strate S and the Fossile S. the sytèmes are perhaps more usually used by the Paléontologue S and Géologue S (thus, of the rocks of the system Dévonien are in fact of the rocks of the period of the Dévonien), but the concept of period of the Temps is easy to assimilate by the general public, in particular.
A subdivision of the periods is the time. In 2004, the International Union off Geological Sciences (IUGS) recognized the Édiacarien like period of the Néoprotérozoïque: last the one period addition on a geological time scale went back to nearly 130 years.
Periods defined by the IUGS
The organization of standardization of the geological time scale is the International commission of stratigraphy, which works within the International Union off Geological Sciences (IUGS) to establish a scale normalized and up to date compared to the discoveries of the scientists of the whole world. The table below presents the periods officially definite by the IUGS since the end of 2004. Between brackets, times.
Other periods, breaking up the eras of the Paléoprotérozoïque, the Mésoprotérozoïque and the Néoprotérozoïque (that is to say, three eras of the éon of the Protérozoïque), are commonly distinguished and taught.
a famous reference popular to the geological periods is the film Jurassic Park, which takes again the name of the Jurassic , period of the era of the Mesozoic .
- the glacial periods inspired several films or drawing-animated (the Age of ice, the Day according to…) as well as accounts and novels.
Category: Geological time scale
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