1. age = x ± y (| z)

   x: |
   y: | .
   z: |

2. (207Pb/204Pb)c (40Ar/36Ar)0 (Pb/Pb)c (234U/238U)i (230Th/238U)i (234U/238U)a (230Th/232Th)d (230Th/232Th)0 (230Th/238U)a (234U/238U)i intercept = x ± y (| z)

   x: |
   y: | .
   z: |

3. MSWD = x, p(χ2) = y

   x: |
   y: |

4. dispersion = x ± y

   x: |  |
   y: | .

Ludwig, K.R. and Titterington, D.M., 1994. Calculation of 230Th/U isochrons, ages, and errors. Geochimica et Cosmochimica Acta, 58(22), pp.5031-5042.

Ludwig, K.R., 1998. On the treatment of concordant uranium-lead ages. Geochimica et Cosmochimica Acta, 62, 665-676.

Nicolaysen, L. Graphic interpretation of discordant age measurements on metamorphic rocks, 1961. Annals of the New York Academy of Sciences, 91(1):198–206.

Vermeesch, P. 2020. Unifying the U-Pb and Th-Pb methods: joint isochron regression and common Pb correction, Geochronology, 2(1), 119-131,

York, D., Evensen, N.M., Martinez, M.L. and De Basabe Delgado, J., 2004. Unified equations for the slope, intercept, and standard errors of the best straight line. American Journal of Physics, 72(3), pp.367-375.