biozones                Ammonite biozone ages for the Upper Cretaceous
geoscale-package        Geological Time Scale Plotting
geoscaleBox             Geological box plots.
geoscalePlot            Geological time scale plotting.
size                    Body-size data from trilobite specimens
timescales              Geological time scale from Harland et al.,
                        (2012)
traits                  A time-series for one trait.
