Legend:

1. central age = t ± x | y | z

   t: |
   x: |
   y: |
   z: |

2. MSWD = x, p(χ2) = y

   x: |
   y: |

3. dispersion = ω + u /- l %

   ω: |
   u: |
   l: |

Aitchison, J., 1982, The statistical analysis of compositional data. Journal of the Royal Statistical Society, v. 44, p. 139-177.

Aitchison, J., 1986, The statistical analysis of compositional data. London, Chapman and Hall, 416 p.

Vermeesch, P., 2008. Three new ways to calculate average (U-Th)/He ages. Chemical Geology, 249(3), pp.339-347.

Vermeesch, P., 2010. HelioPlot, and the treatment of overdispersed (U-Th-Sm)/He data. Chemical Geology, 271(3), pp.108-111.