Table 1 Statistics describing the isotopic composition of the studied iron sulfides.
From: Exceptional sulfur and iron isotope enrichment in millimetre-sized, early Palaeozoic animal burrows
Sample category | Sample | n | Minimum (‰) | First quartile (‰) | Median (‰) | Third quartile (‰) | Maximum (‰) | 1σ (± ‰) |
|---|---|---|---|---|---|---|---|---|
δ34S | ||||||||
Pyritized sheaths and 'tubes' | FC1021 | 20 | 25.44 | 30.70 | 33.33 | 40.33 | 52.58 | 0.12 |
FC1020-1 | 20 | 34.378 | 44.053 | 46.789 | 47.790 | 51.046 | 0.12 | |
FC1020-4 | 23 | 26.281 | 44.772 | 48.618 | 52.882 | 57.622 | 0.11 | |
Sand-filled burrows | FC1020-6a | 7 | 41.346 | 42.155 | 42.865 | 47.841 | 57.384 | 0.14 |
FC1020-6b | 5 | 16.171 | 19.266 | 36.731 | 40.549 | 46.479 | 0.11 | |
Non-bioturbated | FC1020-7 | 6 | 33.141 | 42.191 | 44.817 | 47.063 | 50.902 | 0.16 |
δ56Fe | ||||||||
Pyritized sheaths and 'tubes' | FC1021 | 19 | − 0.92 | − 0.68 | − 0.52 | − 0.43 | − 0.08 | 0.10 |
FC1020-1 | 17 | − 1.00 | − 0.80 | − 0.63 | − 0.38 | 0.16 | 0.10 | |
FC1020-4 | 25 | − 0.34 | − 0.13 | 0.02 | 0.25 | 0.94 | 0.09 | |
Sand-filled burrows | FC1020-6a | 9 | − 0.13 | 0.10 | 0.44 | 0.67 | 1.08 | 0.20 |
FC1020-6b | 6 | 1.31 | 1.54 | 2.02 | 2.12 | 2.18 | 0.20 | |
Non-bioturbated | FC1020-7 | 6 | 0.17 | 0.36 | 0.48 | 0.78 | 1.15 | 0.11 |
Beach Formation whole rock isotope analyses | Sample | Stratigraphic height (m) | δ34S‰ CDT (‰) | 1σ (± ‰) | δ56Fe‰ IRMM-14 (‰) | 1σ (± ‰) | ||
FC1022 | 21.91 | 17.2 | 0.19 | − 0.10 | 0.02 | |||
FC1020 | 20.96 | 41.7 | 0.15 | − 0.12 | 0.08 | |||
FC1019 | 20.20 | 30.3 | 0.15 | − 0.48 | 0.46 | |||
FC1018 | 19.45 | 28.9 | 0.46 | − 0.31 | 0.21 | |||
FC1012 | 18.85 | 39.4 | 0.23 | − 0.06 | 0.11 | |||
FC0915 | 18.15 | 18.1 | 0.20 | − 0.50 | 0.18 | |||
FC1201 | 12.20 | 30.6 | 0.28 | − 0.13 | 0.11 | |||
FC10XXX | 11.73 | 24.3 | 0.22 | − 0.19 | 0.01 | |||
FC09A5b | 1.60 | 33.0 | 0.22 | − 0.09 | 0.13 | |||
FC09A2b | 0.85 | 13.3 | 0.41 | − 0.01 | 0.15 | |||
