Table 1.
Mean values of carbon and oxygen isotope ratios for each taxon
| Taxon | n | Mean δ13C, ‰ PDB |
Mean (±1σ) δ18O,‰ PDB | Mean (±1σ) δ18O,‰ SMOW | |
|---|---|---|---|---|---|
| Enamel (±1σ) | Ecosystem | ||||
| Fossils | |||||
| Moeritherium sp. | 5 | −8.882 ± 0.36 | −22.882 | −3.887 ± 0.42 | 26.901 ± 0.44 |
| Barytherium sp. | 5 | −7.847 ± 0.56 | −21.847 | −4.255 ± 0.44 | 26.523 ± 0.45 |
| Anthracotheriid | 6 | −8.499 ± 1.16 | −22.499 | 0.747 ± 1.23 | 31.680 ± 1.27 |
| Thyrohyrax meyeri | 6 | −7.961 ± 0.70 | −21.961 | 1.336 ± 0.73 | 32.287 ± 0.75 |
| Saghatherium bowni | 9 | −8.276 ± 0.45 | −22.276 | 2.019 ± 1.04 | 32.991 ± 1.07 |
| Hyracoid (BQ-2) | 6 | −6.216 ± 0.44 | −20.216 | −0.079 ± 0.73 | 30.828 ± 0.75 |
| Rocks | |||||
| Rock from L-41 | 4 | −0.842 ± 0.69 | −1.734 ± 2.22 | 29.122 ± 2.29 | |
| Sample L-41a | 1 | −9.475 | 1.770 | 32.735 | |
| Rock from BQ-2 | 9 | −0.538 ± 0.31 | 6.975 ± 1.10 | 38.100 ± 1.13 | |
″Rock from L-41″ does not include sample L-41a, which is displayed separately to show the distinct difference between it and other L-41 results. n = number of specimens successfully sampled for each mammal group. Ecosystem δ13C values were obtained by subtracting an enamel-diet fractionation value of 14‰ from the enamel values.