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| ==Useful links== | | ==Useful links== |
− | * [https://en.wikipedia.org/wiki/Series_(stratigraphy) Series] | + | * [https://en.wikipedia.org/wiki/Series_(stratigraphy) Wikipedia Series article] |
− | * [https://engineering.purdue.edu/Stratigraphy/strat_guide/chro.html Stratigraphic guide] | + | * [https://engineering.purdue.edu/Stratigraphy/strat_guide/chro.html Purdue University Stratigraphic guide] |
− | * [https://en.wikipedia.org/wiki/Geologic_time_scale:Terminology Geologic time scale] | + | * [https://en.wikipedia.org/wiki/Geologic_time_scale:Terminology Wikipedia Geologic time scale] |
| | | |
| ==See also== | | ==See also== |