New SHRIMP zircon ages from tuffs within the British Palaeozoic stratotypes
Two different approaches to deconvolving mixed age populations resolve SIMS ages within the TEMORA reference zircon into a small slightly older group and a large group that is well fitted within the calculated age uncertainties. We discard the older group as spurious rather than increase the uncertainties to try to obtain a (statistically) single propulation. This approach minimizes errors in the sample component ages and allows more reliable detection of potentially real age differences. The...[Show more]
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