Figure 2 | Scanning electron microscope images of three Archaean zircon grains. These three grains were recovered from the MAU-8 trachyte sample. Backscattered electron (BSE) images ( a – c ) of the three grains taken after completing all U–Th–Pb isotopic analyses. Cathodoluminescence (CL) images ( d – f ) taken prior to acquiring our SIMS data. The indicated analysis numbers correspond to those in Supplementary Data 1. The indicated ages are the radiogenic 207 Pb/ 206 Pb ages for the corresponding