Most of the conodont (U–Th)/He dates are younger than the depositional age.
Peak temperatures ≤90 °C caused He loss from the conodonts
Whole conodont platforms yield the youngest and most reproducible (U–Th)/He dates.
Negative date-U and date-Th correlations for remainder of data are due to U–Th loss.
Whole platforms and higher U–Th material are best targets for He dating.