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| ==Useful links== | | ==Useful links== |
− | * [https://en.wikipedia.org/wiki/Stage_(geology) Stages] | + | * [https://en.wikipedia.org/wiki/Stage_(geology) Wikipedia Stages article] |
− | * [http://www.stratigraphy.org/upload/bak/geowhen/geolist.html List of stratigraphic stages] | + | * [http://www.stratigraphy.org/upload/bak/geowhen/geolist.html International Commission on Stratigraphy List of stratigraphic stages] |
− | * [http://www.stratigraphy.org/upload/bak/chron.htm Chronostratigraphic units] | + | * [http://www.stratigraphy.org/upload/bak/chron.htm International Commission on Stratigraphy Chronostratigraphic units] |
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| ==See also== | | ==See also== |