Tera-Wasserburg diagrams showing the U-Pb compositions of zircon from felsic (meta-)igneous rocks in the Sioule region. Diagrams displaying alpha dose values (Dröllner et al., 2022) versus ²⁰⁶Pb/²³⁸U dates are presented for samples with sub-concordant and/or non-equivalent zircon data. The range of metamict state transition follows Chakoumakos et al. (1987). Ellipses, error bars, and dates are reported at 2σ, and ellipse colors represent semi-quantitative U concentrations. Colorless or dashed ellipses as well as colorless dots, interpreted as reflecting common Pb incorporation and/or radiogenic Pb loss were not used for date calculations. Other indications: * - ²⁰⁷Pb/²⁰⁶Pb date, # - ²⁰⁶Pb/²³⁸U date.