What is Stage (geology)?
A '''stage''' or '''age''' in [[geology]] is a period of time measured in millions of years. It is less than an [[epoch (geology)|epoch]], and more than a [[chron]] or chronozone. Technically, a ''stage'' is a succession of rock [[strata]] laid down in a single age on the geologic timescale, which usually represents millions of years of [[sediment]]ation or [[Deposition (geology)|deposition]]. An example of a stage in the [[Historical geology|Geologic time scale]] is the [[Kimmeridgian]]. {{science-stub}} [[Category:Geological periods]]