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Swiss Journal of Palaeontology
Fig. 4 | Swiss Journal of Palaeontology

Fig. 4

From: Geochemical investigation of the mixed Máriahalom vertebrate fauna at the Paleogene–Neogene boundary in the Central Paratethys: environmental conditions and age constrain

Fig. 4

Strontium isotope ratios and related ages from marine fossils recovered from the Máriahalom site. The Sr isotope evolution curve and the individual Sr isotope ages are derived from McArthur et al. (2020). The upper and lower age limits were calculated based on the 95% confidence limit of the curve and the error related to the Sr isotope analyses (external reproducibility of NIST SRM 987: 18 ppm, 2SD, n = 14). Bioapatite (shark teeth), aragonite, and calcite shells (molluscs) were analysed (see also Table 2). The suggested Sr isotope age of 21.4 ± 0.5 Ma for the Máriahalom site is based on the two aragonitic shells (G1 and N1), and the shark enameloid (SE1) (see Table 2) marked by a grey rectangle

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