Discordia Atomica -

: Scientists use mathematical approaches like the "York" or "Ludwig" methods to perform a linear regression of measurements to define the Discordia line.

In the context of geochronology and U-Pb (Uranium-Lead) radioisotope dating, refers to a straight line on a Concordia diagram that represents a suite of minerals that have lost some of their daughter isotopes (lead) or parent isotopes (uranium) due to a geological event. Discordia atomica

A "proper guide" to interpreting a Discordia line involves understanding its two key intersections with the (the mathematically determined line where the age equals the Key Intercepts : Scientists use mathematical approaches like the "York"