One of the initial goals of measuring U-series disequilibria in young volcanic rocks was the development of new dating methods in an age range (about 0–300 ka), where few other methods were applicable at that time (Cerrai et al. 1965; Cherdyntsev et al. 1967; Kigoshi 1967; Taddeucci et al. 1967; Allègre 1968). In the following years, several studies showed that the 238U-230Th method, the first to be applied, was indeed able to give reliable ages on rocks from various volcanoes (e.g., Allègre and Condomines 1976; Condomines et al. 1978)....

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