Age (geology): Difference between revisions
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The '''age''' is the fundamental [[chronostratigraphy|chronostratigraphic]] unit. | The '''age''' is the fundamental [[chronostratigraphy|chronostratigraphic]] unit. | ||
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== External links == | == External links == | ||
* [http://www.stratigraphy.org/ International Commission on Stratigraphy] | * [http://www.stratigraphy.org/ International Commission on Stratigraphy] | ||
Revision as of 07:55, 24 September 2007
The age is the fundamental chronostratigraphic unit.
Being geochronologic units, ages represent a interval of geologic time. The corresponding chronostratigraphic units represent the body of rocks formed during the age, and are called stages
Ages/Stages are formally defined following the indications of the ICS (International Commission on Stratigraphy). More specifically, ages/stages are defined by the GSSP of their base, their top being defined by the GSSP of the overlying age/stage.
A list of ages/stages may be found at the International Commission on Stratigraphy.[1][2]
Interdisciplinary Links in Citizendium
- Earth science
- Stage (geology)
- Geologic time scale
- Geologic ages of earth history
- Chronostratigraphy
- Geochronology
- Geochronometry
- Hydrology
- Biostratigraphy
- Palynology
External links
- ↑ Overview of Global Boundary Stratotype Sections and Points (GSSP's)Status on June 2004, compiled by Jim Ogg (ICS Executive Secretary) (2004)
- ↑ International Stratigraphic Chart