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| geoscale-package | Geological time scale plot. |
| biozones | Ammonite biozone ages for the Upper Cretaceous |
| geoscale | Geological time scale plot. |
| geoscale.plot | Geological time scale plotting. |
| timescales | Geological time scale from Harland et al., (2012) |
| traits | A time-series for one trait. |