Fig. 5.

Comparison of our preferred eruption age, 764.8 ± 0.3/0.6 ka (2σ; analytical/full uncertainties), with the weighted mean eruption age (light blue fields showing 2σ analytical uncertainties) produced by ⁴⁰Ar/³⁹Ar single and multicrystal fusion analysis (7, 8, 15, 18, 47), zircon ages produced by U-Pb ID-TIMS (19, 21) and SIMS (20), and an astronomically tuned age (8). Dates of individual crystals are plotted with 2σ analytical uncertainties; those excluded from the weighted mean calculation are light gray. The two-tone fields show the analytical and full uncertainties for the weighted mean of the BT IH-MCMS dates and the U-Pb ID-TIMS zircon dates of Crowley et al. (19). All ⁴⁰Ar/³⁹Ar data are recalculated using an ACs age of 1.1864 Ma (11, 23) and the decay constants of Min et al. (48). C2014, Chamberlain et al. (20); S-W2000, Sarna-Wojcicki et al. (15); and Z2014, Zeeden et al. (8).