Figure 6

Cumulative probability and ranked distribution of 40Ar–39Ar apparent ages of sanidine and biotite from Group-A (A) and Group-B (B) of the San Vincenzo Rhyolite. Data are total fusion ages obtained from total fusion analyses of individual grains or calculated as total gas ages from step-heating experiments on single grains of both sanidine and biotite (TG SH) or on multigrain aliquots of biotite (TG SH bulk).