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refs 5, 6, 7, 8, 9, 10, 11, 12), investigation of the geochemical glass composition (e.g. refs 12 and 15), modelling of eruption dynamics and tephra dispersal (e.g. 3), relationship of the stratigraphic position of the CI tephra relative to palaeoclimatic (e.g. The yellow shaded area is the dispersal areal of the CI tephra within the 0.5 cm isopach of the simulated ash fallout model. (b) Geological sketch of the Campanian Ignimbrite (CI) pyroclastic deposits and isopach map of the CI Plinian fall (from ref.

In regards to Ar dating of the eruption, limitations in analytical design and knowledge of the age of standards and decay constants have hampered efforts to achieve the necessary precision and accuracy.

With the notable exception of two grains that did not yield plateaus (e.g. S2n), there is no clear evidence of rising, saddle-shaped or otherwise heterogeneous release patterns that would indicate isotopic discordance.

Plateau steps are plotted on inverse isochrons (Ar) in Supplementary Figure S3.

Errors in individual data points (the isochron ages) are shown at 1σ.).

This early result, also determined at BGC, is statistically distinct from the new ages reported for the CI given above at the 95% confidence level.

In regards to Ar dating of the eruption, limitations in analytical design and knowledge of the age of standards and decay constants have hampered efforts to achieve the necessary precision and accuracy.

With the notable exception of two grains that did not yield plateaus (e.g. S2n), there is no clear evidence of rising, saddle-shaped or otherwise heterogeneous release patterns that would indicate isotopic discordance.

Plateau steps are plotted on inverse isochrons (Ar) in Supplementary Figure S3.

Errors in individual data points (the isochron ages) are shown at 1σ.).

This early result, also determined at BGC, is statistically distinct from the new ages reported for the CI given above at the 95% confidence level.

These improved capabilities permit the adoption of single-grain incremental heating, whereas previously only single-grain total-fusion, or multi-grain step-heating approaches were possible.