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40Ar/39Ar age spectra as a function of 39Ar released. The error boxes of each step are at the 2σ level. The error of the plateau ages (P) is given at the 2σ level. Ages were calculated using the Ar–Ar Calc software (Koppers, 2002). Raw data is presented in Supplementary Data.
Spectres d’âge 40Ar/39Ar en fonction du 39Ar libéré.
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