An essential aspect during data reduction is the uncertainty of the common Sr correction (g), which corrects for the amount of common 87 Sr ( 87 Sr c ) that did not form via radioactive decay of 87 Rb. We implemented the procedure proposed by Rösel & Zack (2022) , treating g as a systematic uncertainty that is calculated by weighting the uncertainty of ( 87 Sr/ 86 Sr) initial to the magnitude of the common Sr correction [equation ( ) in Rösel & Zack 2022)] . In case the fraction of 87 Sr c is low enough (< ~1%), a common Sr correction is neglected and ages are directly calculated from the ( 87 Sr/ 86 Rb) true ratios: